Run & fix `go vet`

.github/workflows/main.yml

@@ -11,6 +11,7 @@ jobs:
         with:
           go-version: '1.20'
       - run: './build.sh' # verify the thing compiles first
+      - run: 'go vet ./...'
   test:
     name: 'Go Test (1.20)'
     runs-on: ubuntu-latest

cmd/media_repo/main.go

@@ -100,7 +100,7 @@ func main() {
 	}
 
 	// Set up a listener for SIGINT
-	stop := make(chan os.Signal)
+	stop := make(chan os.Signal, 1)
 	signal.Notify(stop, os.Interrupt, os.Kill)
 	selfStop := false
 	go func() {