refac: remove frontend & clearer DDD

api/middleware/auth.go

@@ -0,0 +1,19 @@
+package middleware
+
+import "net/http"
+
+const KeyContentType = "Content-Type"
+
+func JsonContentTypeMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set(KeyContentType, "application/json")
+		next.ServeHTTP(w, r)
+	})
+}
+
+func HtmlContentTypeMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set(KeyContentType, "text/html")
+		next.ServeHTTP(w, r)
+	})
+}