Fixes wrong use of env variable

Author: nkcr

web/backend/src/Server.ts

@@ -72,7 +72,7 @@ app.use(express.urlencoded({ extended: true }));
 // This endpoint allows anyone to get a "default" proxy. Clients can still use
 // the proxy of their choice thought.
 app.get('/api/config/proxy', (req, res) => {
-  res.status(200).send(process.env.FRONT_END_URL);
+  res.status(200).send(process.env.DELA_NODE_URL);
 });
 
 const usersDB = lmdb.open<'admin' | 'operator', number>({