feat: optimise docker image size

Dockerfile

@@ -11,15 +11,20 @@ COPY go.mod .
 COPY go.sum .
 RUN go mod download
 
-# Copy necessary parts of the Mail-Go source into builder's source
-COPY *.go ./
-COPY middleware middleware
-COPY assets assets
-COPY templates templates
+# Copy all source
+COPY *.go .
+COPY middleware ./middleware
 
 # Build to name "app".
 RUN go build -o app .
 
-EXPOSE 8080
-# Wait until there's an actual MySQL connection we can use to start.
+FROM alpine:latest
+
+WORKDIR /AccountManager
+
+COPY templates ./templates
+COPY assets ./assets
+COPY --from=builder /AccountManager/app .
+
+EXPOSE 9011
 CMD ["./app"]

main.go

@@ -62,6 +62,7 @@ func main() {
 	r.GET("/login", LoginPage)
 	r.GET("/start", StartPanelHandler)
 	r.GET("/authorize", FinishPanelHandler)
+	r.GET("/health", HealthCheck)
 
 	auth := r.Group("/")
 	auth.Use(middleware.AuthenticationMiddleware(verifier))
@@ -91,3 +92,9 @@ func main() {
 	fmt.Printf("Starting HTTP connection (%s)...\nNot using the usual port for HTTP?\nBe sure to use a proxy, otherwise the Wii can't connect!\n", config.Address)
 	log.Fatalln(r.Run(config.Address))
 }
+
+func HealthCheck(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"status": "healthy",
+	})
+}