update:

route/route.go

@@ -19,6 +19,7 @@ func Route(db *gorm.DB) {
 	http.HandleFunc("/birthday-notification", middleware.ResponseTimeMiddleware(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
 		}
 
 		sessionID := helper.GenerateSessionID()
@@ -36,6 +37,7 @@ func Route(db *gorm.DB) {
 			log.Printf("%+v %+v response %+v", sessionID, module, err.Error())
 			w.WriteHeader(500)
 			w.Write([]byte(err.Error()))
+			return
 		}
 
 		for _, v := range *data {
@@ -69,6 +71,7 @@ func Route(db *gorm.DB) {
 	http.HandleFunc("/workanniversary-notification", middleware.ResponseTimeMiddleware(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
 		}
 
 		sessionID := helper.GenerateSessionID()
@@ -85,6 +88,7 @@ func Route(db *gorm.DB) {
 			log.Printf("%+v %+v response %+v", sessionID, module, err.Error())
 			w.WriteHeader(500)
 			w.Write([]byte(err.Error()))
+			return
 		}
 
 		subject := "Work Anniversary 🎉"
@@ -124,6 +128,7 @@ func Route(db *gorm.DB) {
 	http.HandleFunc("/server-down-notification", middleware.ResponseTimeMiddleware(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
 		}
 
 		sessionID := helper.GenerateSessionID()
@@ -160,6 +165,7 @@ func Route(db *gorm.DB) {
 	http.HandleFunc("/high-memory-notification", middleware.ResponseTimeMiddleware(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
 		}
 
 		sessionID := helper.GenerateSessionID()
@@ -196,13 +202,15 @@ func Route(db *gorm.DB) {
 	http.Handle("/", middleware.ResponseTimeMiddleware(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
 		}
 
 		if r.URL.Path != "/" {
 			w.WriteHeader(404)
 			w.Write([]byte("What are you looking for?!"))
-		} else {
-			w.Write([]byte("Welcome!"))
+			return
 		}
+
+		w.Write([]byte("Welcome!"))
 	}))
 }