Reverse proxy from nginx to squid

Question

Similar to this, I am trying to host a squid proxy behind nginx:

example.com - the main site

relay.example.com - the squid server.

Answer 1

in nginx:

proxy_pass http://@squid;

in squid:

http_port 3128 vhost

and that's all you need for fix this https://imgur.com/qtgrZI9 error