diff --git a/.env.dist b/.env.dist
index a0f7c77..9e2d4c1 100644
--- a/.env.dist
+++ b/.env.dist
@@ -1,5 +1,8 @@
 AUTH_CONFIG_PATH=./auth.yml
 FILE_STORAGE_PATH=
 FILE_NAME_LENGTH=12
+FILE_MAX_SIZE=100
 FILE_META_DB_PATH=
 FILE_EXPIRATION_CYCLE=10
+METRICS_ENABLED=true
+FILE_SERVING_ENABLED=true
diff --git a/README.md b/README.md
index fa7579b..33a5747 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@ The diagram above shows the general structure of the system. It is heavily based
 
 There are as always multiple ways to install the server. The recommended way is to use Docker Compose or deploy it to Kubernetes, but we start with the manual way.
 
+Also, if you don't want the server to serve the files themselves, then you can disable it via the environment variable described in section [Configuration](#configuration). That could be the case if you already have a Nginx installed and want it to serve the files instead of aqua. That way, you have full customization options.
+
 ## Manually
 
 This is only for those people, that are still living in the 90s or are not comfortable with a Docker installation.
@@ -56,8 +58,11 @@ For examplary usage of the environment variables, have a look at the `.env.dist`
 | `AUTH_CONFIG_PATH` | Path to the `auth.yml` config file. |
 | `FILE_STORAGE_PATH` | Path to the directory, where the files should be stored. |
 | `FILE_NAME_LENGTH` | Length of the file names, that should be randomly generated. Should be long enough to make guessing impossible. Cannot be longer than 24 characters. |
+| `FILE_MAX_SIZE` | Maximum size for uploaded files in Megabytes. |
 | `FILE_META_DB_PATH` | Path to the directory, where the sqlite database for file metadata should be stored. Recommended to not be the same folder as `FILE_STORAGE_PATH` to prevent overlapping. |
 | `FILE_EXPIRATION_CYCLE` | Determines the interval of the expiration cycle. `5` means that every 5 seconds the files will be checked for expiration.  |
+| `METRICS_ENABLED` | Is normally set to true, but otherwise disables the Prometheus metrics publishing. |
+| `FILE_SERVING_ENABLED` | Defaults to true, when `false`, then the server won't serve the stored files. |
 
 ## Tokens
 
@@ -86,14 +91,40 @@ After adding the token to the list you may want to restrict what files can be up
 Normally we would accept every possible MIME type, but as they behave completely different sometimes and we want to keep it simple, we **only support** the following ones:
 
 ```
-application/pdf
+application/gzip
 application/json
-image/png
+application/pdf
+application/vnd.rar
+application/x-7z-compressed
+application/zip
+audio/mpeg
+audio/ogg
+audio/opus
+audio/webm
+image/gif
 image/jpeg
+image/png
+image/svg+xml
 text/csv
 text/plain
+video/mp4
+video/mpeg
+video/webm
 ```
 
+# Metrics
+
+We also expose Prometheus metrics to the port `:8766`, if the specific environment variable is not set to `false`. To scrape these metrics simply make sure that they are enabled and that you add them to the Prometheus scrape targets.
+
+If you are in a Kubernetes environment instead, a normal Prometheus deployment should automatically pick up the metrics, because we add specific annotations to the pods. If that does not work, or you are using the Prometheus Operator, you might want to have a look at `ServiceMonitor`s somewhere at the [Prometheus Operator documentation](https://github.com/prometheus-operator/prometheus-operator).
+
+Here is a list of all Prometheus metrics:
+
+| Metric | Description |
+| ------ | ----------- |
+| aqua_files_uploaded_total | Self explanatory |
+| aqua_files_expired_total | Self explanatory lol |
+
 # CLI Tool
 
 Installing the CLI tool is fairly simple. Just download the respective binary from [releases](https://github.com/Superioz/aqua/releases), rename it and put it somewhere in your `$PATH`. Don't forget to add execution permissions `chmod +x aq`.
diff --git a/auth.yml b/auth.yml
index 6d5d545..6365365 100644
--- a/auth.yml
+++ b/auth.yml
@@ -1,5 +1,6 @@
-validTokens:
-- token: 71a4c056ab9b0fb965063344cd6616bc
-  fileTypes:
-  - image/png
-  - image/jpeg
\ No newline at end of file
+validTokens:
+- token: 71a4c056ab9b0fb965063344cd6616bc
+  fileTypes:
+  - image/png
+  - image/jpeg
+  - video/mp4
diff --git a/cmd/aqua/main.go b/cmd/aqua/main.go
index 85a29f1..5da0a9c 100644
--- a/cmd/aqua/main.go
+++ b/cmd/aqua/main.go
@@ -5,7 +5,7 @@ import (
 	"github.com/go-co-op/gocron"
 	"github.com/joho/godotenv"
 	"github.com/superioz/aqua/internal/handler"
-	"github.com/superioz/aqua/internal/storage"
+	"github.com/superioz/aqua/internal/metrics"
 	"github.com/superioz/aqua/pkg/env"
 	"github.com/superioz/aqua/pkg/middleware"
 	"k8s.io/klog"
@@ -22,7 +22,7 @@ func main() {
 	r := gin.New()
 	r.Use(middleware.Logger(3 * time.Second))
 	// restrict to max 100mb
-	r.Use(middleware.RestrictBodySize(100 * handler.SizeMegaByte))
+	r.Use(middleware.RestrictBodySize(int64(env.IntOrDefault("FILE_MAX_SIZE", 100)) * handler.SizeMegaByte))
 	r.Use(gin.Recovery())
 
 	// handler for receiving uploaded files
@@ -42,7 +42,15 @@ func main() {
 	}
 	s.StartAsync()
 
-	r.Static("/", env.StringOrDefault("FILE_STORAGE_PATH", storage.EnvDefaultFileStoragePath))
+	if env.BoolOrDefault("FILE_SERVING_ENABLED", true) {
+		r.GET("/:file", handler.HandleStaticFiles())
+		r.HEAD("/:file", handler.HandleStaticFiles())
+	}
+
+	// finally, start the metrics server as well
+	if env.BoolOrDefault("METRICS_ENABLED", true) {
+		go metrics.StartMetricsServer()
+	}
 
 	_ = r.Run(":8765")
 }
diff --git a/go.mod b/go.mod
index 22dbcfd..aea67b2 100644
--- a/go.mod
+++ b/go.mod
@@ -4,40 +4,48 @@ go 1.17
 
 require (
 	github.com/gin-gonic/gin v1.7.4
+	github.com/go-co-op/gocron v1.9.0
+	github.com/google/uuid v1.3.0
+	github.com/h2non/filetype v1.1.1
+	github.com/joho/godotenv v1.4.0
+	github.com/prometheus/client_golang v1.11.0
+	github.com/urfave/cli/v2 v2.3.0
+	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/klog v1.0.0
+	modernc.org/sqlite v1.14.1
 )
 
 require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
-	github.com/go-co-op/gocron v1.9.0 // indirect
 	github.com/go-playground/locales v0.13.0 // indirect
 	github.com/go-playground/universal-translator v0.17.0 // indirect
 	github.com/go-playground/validator/v10 v10.4.1 // indirect
-	github.com/golang/protobuf v1.3.3 // indirect
-	github.com/google/uuid v1.3.0 // indirect
-	github.com/h2non/filetype v1.1.1 // indirect
-	github.com/joho/godotenv v1.4.0 // indirect
-	github.com/json-iterator/go v1.1.9 // indirect
+	github.com/golang/protobuf v1.4.3 // indirect
+	github.com/json-iterator/go v1.1.11 // indirect
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
 	github.com/leodido/go-urn v1.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.12 // indirect
-	github.com/mattn/go-sqlite3 v1.14.9 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
-	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.26.0 // indirect
+	github.com/prometheus/procfs v0.6.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
 	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/russross/blackfriday/v2 v2.0.1 // indirect
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/ugorji/go/codec v1.1.7 // indirect
-	github.com/urfave/cli/v2 v2.3.0 // indirect
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
 	golang.org/x/mod v0.3.0 // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac // indirect
 	golang.org/x/tools v0.0.0-20201124115921-2c860bdd6e78 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	google.golang.org/protobuf v1.26.0-rc.1 // indirect
 	lukechampine.com/uint128 v1.1.1 // indirect
 	modernc.org/cc/v3 v3.35.17 // indirect
 	modernc.org/ccgo/v3 v3.12.65 // indirect
@@ -45,7 +53,6 @@ require (
 	modernc.org/mathutil v1.4.1 // indirect
 	modernc.org/memory v1.0.5 // indirect
 	modernc.org/opt v0.1.1 // indirect
-	modernc.org/sqlite v1.14.1 // indirect
 	modernc.org/strutil v1.1.1 // indirect
 	modernc.org/token v1.0.0 // indirect
 )
diff --git a/go.sum b/go.sum
index e028b13..c94b979 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,22 @@
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
+github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
@@ -11,6 +24,12 @@ github.com/gin-gonic/gin v1.7.4 h1:QmUZXrvJ9qZ3GfWvQ+2wnW/1ePrTEJqPKMYEU3lD/DM=
 github.com/gin-gonic/gin v1.7.4/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
 github.com/go-co-op/gocron v1.9.0 h1:+V+DDenw3ryB7B+tK1bAIC5p0ruw4oX9IqAsdRnGIf0=
 github.com/go-co-op/gocron v1.9.0/go.mod h1:DbJm9kdgr1sEvWpHCA7dFFs/PGHPMil9/97EXCRPr4k=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
+github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
+github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
 github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
 github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
@@ -20,9 +39,27 @@ github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD87
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
 github.com/go-playground/validator/v10 v10.4.1 h1:pH2c5ADXtd66mxoE0Zm9SUhxE20r7aM3F26W0hOn+GE=
 github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
-github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -30,22 +67,63 @@ github.com/h2non/filetype v1.1.1 h1:xvOwnXKAckvtLWsN398qS9QhlxlnVXBjXBydK2/UFB4=
 github.com/h2non/filetype v1.1.1/go.mod h1:319b3zT68BvV+WRj7cwy856M2ehB3HqNOt6sy1HndBY=
 github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
 github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
-github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
+github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
+github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
+github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
+github.com/json-iterator/go v1.1.11 h1:uVUAXhF2To8cbw/3xN3pxj6kk7TYKs98NIrTqPlMWAQ=
+github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
+github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
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@@ -54,10 +132,15 @@ github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0
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+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.26.0-rc.1 h1:7QnIQpGRHE5RnLKnESfDoxm2dTapTZua5a0kS0A+VXQ=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
@@ -159,6 +276,7 @@ modernc.org/ccgo/v3 v3.12.57/go.mod h1:hNSF4DNVgBl8wYHpMvPqQWDQx8luqxDnNGCMM4NFN
 modernc.org/ccgo/v3 v3.12.60/go.mod h1:k/Nn0zdO1xHVWjPYVshDeWKqbRWIfif5dtsIOCUVMqM=
 modernc.org/ccgo/v3 v3.12.65 h1:k2m2owVfoAQ55AnED+M7w7WnEkt0+Z+XY0qpdGOh3gI=
 modernc.org/ccgo/v3 v3.12.65/go.mod h1:D6hQtKxPNZiY6wDBtehSGKFKmyXn53F8nGTpH+POmS4=
+modernc.org/httpfs v1.0.6 h1:AAgIpFZRXuYnkjftxTAZwMIiwEqAfk8aVB2/oA6nAeM=
 modernc.org/httpfs v1.0.6/go.mod h1:7dosgurJGp0sPaRanU53W4xZYKh14wfzX420oZADeHM=
 modernc.org/libc v1.9.8/go.mod h1:U1eq8YWr/Kc1RWCMFUWEdkTg8OTcfLw2kY8EDwl039w=
 modernc.org/libc v1.9.11/go.mod h1:NyF3tsA5ArIjJ83XB0JlqhjTabTCHm9aX4XMPHyQn0Q=
@@ -206,7 +324,9 @@ modernc.org/sqlite v1.14.1 h1:jthfQCbWKfbK/lvZSjFEpBk0QzIBN6pQbFdDqBMR490=
 modernc.org/sqlite v1.14.1/go.mod h1:04Lqa+3PuAEUhAPAPWeDMljT4UYA31nb2DHTFG47L1g=
 modernc.org/strutil v1.1.1 h1:xv+J1BXY3Opl2ALrBwyfEikFAj8pmqcpnfmuwUwcozs=
 modernc.org/strutil v1.1.1/go.mod h1:DE+MQQ/hjKBZS2zNInV5hhcipt5rLPWkmpbGeW5mmdw=
+modernc.org/tcl v1.8.13 h1:V0sTNBw0Re86PvXZxuCub3oO9WrSTqALgrwNZNvLFGw=
 modernc.org/tcl v1.8.13/go.mod h1:V+q/Ef0IJaNUSECieLU4o+8IScapxnMyFV6i/7uQlAY=
 modernc.org/token v1.0.0 h1:a0jaWiNMDhDUtqOj09wvjWWAqd3q7WpBulmL9H2egsk=
 modernc.org/token v1.0.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
+modernc.org/z v1.2.19 h1:BGyRFWhDVn5LFS5OcX4Yd/MlpRTOc7hOPTdcIpCiUao=
 modernc.org/z v1.2.19/go.mod h1:+ZpP0pc4zz97eukOzW3xagV/lS82IpPN9NGG5pNF9vY=
diff --git a/internal/handler/upload.go b/internal/handler/handler.go
similarity index 74%
rename from internal/handler/upload.go
rename to internal/handler/handler.go
index 01928df..f59eaab 100644
--- a/internal/handler/upload.go
+++ b/internal/handler/handler.go
@@ -5,11 +5,13 @@ import (
 	"fmt"
 	"github.com/gin-gonic/gin"
 	"github.com/superioz/aqua/internal/config"
+	"github.com/superioz/aqua/internal/metrics"
 	"github.com/superioz/aqua/internal/storage"
 	"github.com/superioz/aqua/pkg/env"
 	"k8s.io/klog"
 	"mime/multipart"
 	"net/http"
+	"os"
 	"strings"
 )
 
@@ -18,13 +20,28 @@ const (
 )
 
 var (
+	// validMimeTypes is a whitelist of all supported
+	// mime types. Taken from https://developer.mozilla.org/
 	validMimeTypes = []string{
 		"application/pdf",
 		"application/json",
+		"application/gzip",
+		"application/vnd.rar",
+		"application/zip",
+		"application/x-7z-compressed",
 		"image/png",
 		"image/jpeg",
+		"image/gif",
+		"image/svg+xml",
 		"text/csv",
 		"text/plain",
+		"audio/mpeg",
+		"audio/ogg",
+		"audio/opus",
+		"audio/webm",
+		"video/mp4",
+		"video/mpeg",
+		"video/webm",
 	}
 
 	emptyRequestMetadata = &RequestMetadata{Expiration: storage.ExpireNever}
@@ -41,29 +58,33 @@ type UploadHandler struct {
 
 func NewUploadHandler() *UploadHandler {
 	handler := &UploadHandler{}
+	handler.ReloadAuthConfig()
 
+	handler.FileStorage = storage.NewFileStorage()
+	return handler
+}
+
+// ReloadAuthConfig reloads the auth.yml config from the local file system.
+func (h *UploadHandler) ReloadAuthConfig() {
 	path := env.StringOrDefault("AUTH_CONFIG_PATH", "/etc/aqua/auth.yml")
 	ac, err := config.FromLocalFile(path)
 	if err != nil {
 		// this is not good, but the system still works.
 		// nobody can upload a file though.
 		klog.Warningf("Could not open auth config at %s: %v", path, err)
-		handler.AuthConfig = config.NewEmptyAuthConfig()
+		h.AuthConfig = config.NewEmptyAuthConfig()
 	} else {
 		klog.Infof("Loaded %d valid tokens", len(ac.ValidTokens))
-		handler.AuthConfig = ac
+		h.AuthConfig = ac
 	}
-
-	handler.FileStorage = storage.NewFileStorage()
-	return handler
 }
 
-func (u *UploadHandler) Upload(c *gin.Context) {
+func (h *UploadHandler) Upload(c *gin.Context) {
 	// get token for auth
 	// empty string, if not given
 	token := getToken(c)
 
-	if !u.AuthConfig.HasToken(token) {
+	if !h.AuthConfig.HasToken(token) {
 		c.JSON(http.StatusUnauthorized, gin.H{"msg": "the token is not valid"})
 		return
 	}
@@ -96,7 +117,7 @@ func (u *UploadHandler) Upload(c *gin.Context) {
 		return
 	}
 
-	if !u.AuthConfig.CanUpload(token, ct) {
+	if !h.AuthConfig.CanUpload(token, ct) {
 		c.JSON(http.StatusForbidden, gin.H{"msg": "you can not upload a file with this content type"})
 		return
 	}
@@ -113,7 +134,7 @@ func (u *UploadHandler) Upload(c *gin.Context) {
 	defer of.Close()
 
 	metadata := getMetadata(form)
-	sf, err := u.FileStorage.StoreFile(of, metadata.Expiration)
+	sf, err := h.FileStorage.StoreFile(of, metadata.Expiration)
 	if err != nil {
 		klog.Error(err)
 		c.JSON(http.StatusInternalServerError, gin.H{"msg": "could not store file"})
@@ -125,6 +146,7 @@ func (u *UploadHandler) Upload(c *gin.Context) {
 	}
 
 	klog.Infof("Stored file %s (expiresIn: %s)", sf.Id, expiresIn)
+	metrics.IncFilesUploaded()
 
 	c.JSON(http.StatusOK, gin.H{"id": sf.Id})
 }
@@ -177,3 +199,23 @@ func getToken(c *gin.Context) string {
 	spl := strings.Split(bearerToken, "Bearer ")
 	return spl[1]
 }
+
+// HandleStaticFiles takes the files inside the configured file storage
+// path and serves them to the client.
+func HandleStaticFiles() gin.HandlerFunc {
+	fileStoragePath := env.StringOrDefault("FILE_STORAGE_PATH", storage.EnvDefaultFileStoragePath)
+
+	return func(c *gin.Context) {
+		fileName := c.Param("file")
+		fullPath := fileStoragePath + fileName
+
+		f, err := os.Open(fullPath)
+		if err != nil {
+			c.Status(http.StatusNotFound)
+			return
+		}
+		f.Close()
+
+		c.File(fullPath)
+	}
+}
diff --git a/internal/metrics/metrics.go b/internal/metrics/metrics.go
new file mode 100644
index 0000000..6732252
--- /dev/null
+++ b/internal/metrics/metrics.go
@@ -0,0 +1,47 @@
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"k8s.io/klog"
+	"net/http"
+)
+
+var (
+	filesUploaded = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "aqua_files_uploaded_total",
+		Help: "The total number of files uploaded",
+	})
+
+	filesExpired = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "aqua_files_expired_total",
+		Help: "The total number of files expired",
+	})
+)
+
+// StartMetricsServer starts the internal Prometheus metrics server
+// which enables us to seperate traffic from this endpoint and the normal file
+// serving.
+func StartMetricsServer() {
+	mux := http.NewServeMux()
+
+	mux.Handle("/metrics", promhttp.Handler())
+
+	addr := ":8766"
+
+	klog.Infof("Starting the metrics server on %s", addr)
+	err := http.ListenAndServe(addr, mux)
+	if err != nil {
+		klog.Warningf("Could not start the metrics server: %v", err)
+		return
+	}
+}
+
+func IncFilesUploaded() {
+	filesUploaded.Inc()
+}
+
+func IncFilesExpired() {
+	filesExpired.Inc()
+}
diff --git a/internal/storage/files.go b/internal/storage/files.go
index 3615ab0..e476c4e 100644
--- a/internal/storage/files.go
+++ b/internal/storage/files.go
@@ -10,6 +10,7 @@ type FileSystem interface {
 	CreateFile(mf multipart.File, name string) (bool, error)
 	DeleteFile(id string) error
 	GetFile(id string) (*os.File, error)
+	Exists(id string) (bool, error)
 }
 
 type LocalFileSystem struct {
@@ -45,6 +46,14 @@ func (l LocalFileSystem) GetFile(id string) (*os.File, error) {
 	return os.Open(l.FolderPath + id)
 }
 
+func (l LocalFileSystem) Exists(id string) (bool, error) {
+	_, err := os.Stat(l.FolderPath + id)
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return true, err
+}
+
 func NewLocalFileStorage(path string) *LocalFileSystem {
 	return &LocalFileSystem{FolderPath: path}
 }
diff --git a/internal/storage/storage.go b/internal/storage/storage.go
index 3e768f3..93ac18f 100644
--- a/internal/storage/storage.go
+++ b/internal/storage/storage.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/google/uuid"
+	"github.com/superioz/aqua/internal/metrics"
 	"github.com/superioz/aqua/pkg/env"
 	"k8s.io/klog"
 	"mime/multipart"
@@ -74,18 +75,27 @@ func (fs *FileStorage) Cleanup() error {
 			continue
 		}
 
-		klog.Infof("Delete file %s (expired at %s)", file.Id, time.Unix(file.ExpiresAt, 0).String())
-
-		// delete this file
-		err = fs.fileSystem.DeleteFile(file.Id)
+		// check if file doesn't exist anymore
+		ok, err := fs.fileSystem.Exists(file.Id)
 		if err != nil {
-			return fmt.Errorf("could not delete file with id=%s: %v", file.Id, err)
+			return fmt.Errorf("could not check if file exists with id=%s: %v", file.Id, err)
+		}
+		if ok {
+			// file exists
+			// delete this file
+			err = fs.fileSystem.DeleteFile(file.Id)
+			if err != nil {
+				return fmt.Errorf("could not delete file with id=%s: %v", file.Id, err)
+			}
 		}
 
 		err = fs.fileMetaDb.DeleteFile(file.Id)
 		if err != nil {
 			return fmt.Errorf("could not delete file with id=%s: %v", file.Id, err)
 		}
+
+		klog.Infof("Delete file %s (expired at %s)", file.Id, time.Unix(file.ExpiresAt, 0).String())
+		metrics.IncFilesExpired()
 	}
 	return nil
 }
diff --git a/kubernetes/statefulset.yaml b/kubernetes/statefulset.yaml
index c84ef88..5cd0ba8 100644
--- a/kubernetes/statefulset.yaml
+++ b/kubernetes/statefulset.yaml
@@ -12,12 +12,19 @@ spec:
     metadata:
       labels:
         app: aqua
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/path: "/metrics"
+        prometheus.io/port: "8766"
     spec:
       containers:
       - name: aqua
         image: ghcr.io/superioz/aqua:latest
         ports:
-        - containerPort: 8765
+        - name: files
+          containerPort: 8765
+        - name: metrics
+          containerPort: 8766
         env:
         - name: AUTH_CONFIG_PATH
           value: /etc/aqua/auth.yml
@@ -57,4 +64,7 @@ spec:
   selector:
     app: aqua
   ports:
-  - port: 8765
+  - name: files
+    port: 8765
+  - name: metrics
+    port: 8766
diff --git a/pkg/shttp/shttp.go b/pkg/shttp/shttp.go
index ef16ded..22e3e8c 100644
--- a/pkg/shttp/shttp.go
+++ b/pkg/shttp/shttp.go
@@ -30,7 +30,7 @@ func Upload(client *http.Client, url string, values map[string]io.Reader, header
 
 		// Add an image file
 		if file, ok := r.(*os.File); ok {
-			mime, err := GetFileType(file)
+			mime, err := DetectFileType(file)
 			if err != nil {
 				return nil, err
 			}
@@ -88,9 +88,9 @@ func escapeQuotes(s string) string {
 	return quoteEscaper.Replace(s)
 }
 
-// GetFileType returns the MIME type of given file by reading
+// DetectFileType returns the MIME type of given file by reading
 // the file header of the file that is located on disk.
-func GetFileType(file *os.File) (string, error) {
+func DetectFileType(file *os.File) (string, error) {
 	f, err := os.Open(file.Name())
 	if err != nil {
 		return "", err