Fix identifier duplication in URL

Author: YoYo178

frontend/src/api/backendAPI.ts

@@ -5,5 +5,5 @@ import { BACKEND_URL } from '../config/backendConfig';
 const isProduction = import.meta.env.PROD;
 
 export const API = axios.create({
-    baseURL: BACKEND_URL + `${isProduction ? '/notes-app/api' : '/api'}`,
+    baseURL: BACKEND_URL + `${isProduction ? '/notes-app' : ''}`,
 });