Implement GitHub actions CI

.github/FUNDING.yml

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+github: 'lus'

.github/workflows/docker.yml

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+name: docker
+
+on:
+  push:
+    branches:
+      - main
+      - develop
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v2
+      - name: define branch name
+        run: echo "BRANCH=$(git rev-parse --abbrev-ref HEAD)" >> $GITHUB_ENV
+      - name: define commit hash
+        run: echo "COMMIT_HASH=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
+      - name: define staging tag
+        if: env.BRANCH == 'develop'
+        run: echo "TAG=staging" >> $GITHUB_ENV
+      - name: define latest tag
+        if: env.BRANCH == 'main'
+        run: echo "TAG=latest" >> $GITHUB_ENV
+      - name: set up qemu
+        uses: docker/setup-qemu-action@v1
+      - name: set up buildx
+        uses: docker/setup-buildx-action@v1
+      - name: log in to ghcr
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: lus
+          password: ${{ secrets.CR_TOKEN }}
+      - name: build and push
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ghcr.io/lus/pasty:${{ env.TAG }}
+          build-args:
+            PASTY_VERSION=${{ env.BRANCH }}-${{ env.COMMIT_HASH }}

.github/workflows/general.yml

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+name: general
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v2
+      - name: setup go environment
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.16
+      - name: download dependencies
+        run: |
+          go version
+          go mod download
+      - name: build
+        run: |
+          go build ./cmd/pasty/

Dockerfile

@@ -1,15 +1,20 @@
-# Build the application
+# Choose the golang image as the build base image
 FROM golang:1.16-alpine AS build
-RUN apk update && apk upgrade && \
-    apk add --no-cache bash git openssh build-base
+
+# Define the directory we should work in
 WORKDIR /app
+
+# Download the necessary go modules
 COPY go.mod go.sum ./
 RUN go mod download
+
+# Build the application
+ARG PASTY_VERSION=unset-debug
 COPY . .
 RUN go build \
         -o pasty \
         -ldflags "\
-            -X github.com/lus/pasty/internal/static.Version=$(git rev-parse --abbrev-ref HEAD)-$(git describe --tags --abbrev=0)-$(git log --pretty=format:'%h' -n 1)" \
+            -X github.com/lus/pasty/internal/static.Version=$PASTY_VERSION" \
         ./cmd/pasty/main.go
 
 # Run the application in an empty alpine environment