Update API base URL to use REACT_APP_BACKEND_URL and include '/api' path

web/src/services/api.ts

@@ -1,7 +1,7 @@
 import axios from 'axios';
 
 const api = axios.create({
-  baseURL: process.env.BACKEND_URL || 'http://localhost:3101',
+  baseURL: process.env.REACT_APP_BACKEND_URL || 'http://localhost:3101/api',
 });
 
 export default api;