问题 I have an AWS Ubuntu server that hosts a react front end running at 127.0.0.1:4100 and makes api calls to a Go app using port 127.0.0.1:1323. I installed Nginx and setup proxy pass for these two ports in /etc/nginx/sites-available/default config file but I only get the front end getting called by Nginx. Using chrome inspect to check why the Go app is not serving some of the functionalities from the react app, I see this error client.js:772 GET http://127.0.0.1:1323/api/ net::ERR_CONNECTION