Fix DB related bugs

src/main.rs

@@ -50,10 +50,12 @@ fn main() {
 
     let pool = setup::create_pool(&config.database_url, config.pool_size);
     #[cfg(not(feature = "dev"))]
-    embedded_migrations::run(&pool.get().unwrap()).unwrap_or_else(|e| {
-        eprintln!("Can't prepare database: {}.", e);
-        process::exit(1);
-    });
+    {
+        embedded_migrations::run(&pool.get().unwrap()).unwrap_or_else(|e| {
+            eprintln!("Can't prepare database: {}.", e);
+            process::exit(1);
+        });
+    }
 
     let password_hash = {
         #[cfg(feature = "dev")]

src/setup.rs

@@ -99,7 +99,13 @@ impl Default for Config {
                 .expect("Can't convert database path to string")
                 .to_owned()
         };
-        let pool_size = num_cpus::get() as u32 / 2;
+        let pool_size = {
+            let n = num_cpus::get() as u32 / 2;
+            match n < 1 {
+                true => 1,
+                false => n,
+            }
+        };
         let files_dir = {
             let mut path = get_data_dir();
             path.push("files");