Revert "Simplify static file serving in production"

This reverts commit 6a3bbc0.

Author: vsreddyh

backend/index.js

@@ -16,7 +16,9 @@ app.use(
     credentials: true,
   }),
 );
-app.use(express.static(path.join(__dirname, "./build")));
+if (process.env.NODE_ENV === "production") {
+  app.use(express.static(path.join(__dirname, "./build")));
+}
 
 app.use(bodyParser.json({ limit: "50mb" })); //limit limits the data which can be uploaded to server.js from frontend
 const store = new MongoDBStore({
@@ -43,7 +45,9 @@ app.use(
 );
 
 app.get("/", cors(), (req, res) => {
-  res.sendFile(path.join(__dirname, "./build", "index.html"));
+  if (process.env.NODE_ENV === "production") {
+    res.sendFile(path.join(__dirname, "./build", "index.html"));
+  }
 });
 
 app.use("/en", approute); //routing to all functions