feat: expose prometheus metrics on different port

Dockerfile

@@ -18,4 +18,5 @@ COPY --from=builder /app/api .
 COPY favicon.ico .
 
 EXPOSE 8888
+EXPOSE 8889
 CMD [ "/app/api" ]

README.md

@@ -13,3 +13,5 @@ trafficlunar's api
 - computer statistics websocket
   - The application [here](https://github.com/trafficlunar/computer) is used to send data to this WebSocket
   - After the data is sent, it is turned into chart data and is displayed on my website.
+- github
+  - Gets amount of stars for my repositories

internal/server/prometheus.go

@@ -0,0 +1,14 @@
+package server
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+func StartPrometheusServer() {
+	go func() {
+		http.HandleFunc("/", promhttp.Handler().ServeHTTP)
+		http.ListenAndServe(":8889", nil)
+	}()
+}

internal/server/router.go

@@ -11,7 +11,6 @@ import (
 	"github.com/go-chi/chi/v5/middleware"
 	"github.com/go-chi/cors"
 	"github.com/go-chi/httprate"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"api/internal/handler"
 	app_middleware "api/internal/middleware"
@@ -49,9 +48,6 @@ func NewRouter() {
 	r.Group(func(r chi.Router) {
 		r.Use(app_middleware.PrometheusMiddleware)
 
-		// Prometheus
-		r.Handle("/metrics", promhttp.Handler())
-
 		var commit = "unknown"
 		if os.Getenv("SOURCE_COMMIT") != "" {
 			commit = os.Getenv("SOURCE_COMMIT")[:7] // shorten to 7 characters

main.go

@@ -38,6 +38,7 @@ func main() {
 	go worker.StartWorkers()
 
 	// Shutdown-chan~~
+	// this joke sucks
 	shutdownChan := make(chan os.Signal, 1)
 	signal.Notify(shutdownChan, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
 
@@ -53,5 +54,6 @@ func main() {
 		os.Exit(0)
 	}()
 
+	server.StartPrometheusServer()
 	server.NewRouter()
 }