Add building docker im GHAction

.github/workflows/go.yml

@@ -26,3 +26,16 @@ jobs:
 
     - name: Test
       run: go test -v ./...
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v4
+      with:
+        context: .
+        push: true
+        tags: matbur/image-text:latest

Dockerfile

@@ -5,13 +5,11 @@ WORKDIR /app
 COPY go.mod go.sum ./
 RUN go mod download
 
-COPY . .
-RUN go build -o app ./cmd/image-text
+COPY . ./
+RUN CGO_ENABLED=0 GOOS=linux go build -mod=readonly -v -o bin ./cmd/image-text
 
-FROM alpine:3.20
 
-USER nobody:nobody
+FROM scratch
 
-WORKDIR /app
-COPY --from=build-env app .
-CMD ["./app"]
+COPY --from=build-env /app/bin /server
+ENTRYPOINT ["/server"]

cmd/image-text/main.go

@@ -15,7 +15,7 @@ import (
 )
 
 type config struct {
-	Addr string `envconfig:"ADDR" default:":8021"`
+	Port string `envconfig:"PORT" default:"8080"`
 	Mode string `envconfig:"MODE"`
 }
 
@@ -32,18 +32,21 @@ func main() {
 		os.Exit(1)
 	}
 
+	addr := fmt.Sprintf(":%s", cfg.Port)
+
 	switch cfg.Mode {
 	case "TEST":
-		mode2(cfg.Addr)
+		mode2(addr)
 	default:
-		mode1(cfg.Addr)
+		mode1(addr)
 	}
 }
 
 func mode1(addr string) {
 	slog.Info("Starting server", "addr", addr)
 
 	http.HandleFunc("/favicon.ico", server.HandleFavicon)
+	http.HandleFunc("/healthz", server.HandleHealthz)
 	http.HandleFunc("/", server.HandleMain())
 	if err := http.ListenAndServe(addr, nil); err != nil {
 		if errors.Is(err, http.ErrServerClosed) {

docker-compose.yaml

@@ -3,6 +3,4 @@ services:
     build:
       dockerfile: Dockerfile
     ports:
-      - "8022:8022"
-    environment:
-      - ADDR=:8022
+      - "8022:8080"

server/server.go

@@ -94,3 +94,8 @@ func handleDocs(w http.ResponseWriter, r *http.Request) {
 		slog.Error("Failed to write docs", "err", err)
 	}
 }
+
+func HandleHealthz(w http.ResponseWriter, r *http.Request) {
+	w.Write([]byte("OK"))
+	w.WriteHeader(http.StatusOK)
+}