Unable to setup project under a subdomain

[surajk16]

I was trying to set this up under a subdomain in my server. I got the html and assets part to work under the subdomain. But for some reason, I'm not able to get the socket connection to work.

The polling request that starts with ?EIO=..... always returns a 404 route not found error.
I tried capturing all routes using express and it seems to reach express. But somehow it isn't recognized as a socket connection and reach there.

I tried changing the path variable while creating the io variable but that still doesn't seem to work.

Do I have to do any additional configs to run it under a subdomain?