nginx angular and node proxy config

nginx

server {

    listen 80;
    
    server_name 0.0.0.0;

    root  /var/www/html/dist;
   
    index index.html index.htm;

    location / {
    
        try_files $uri $uri/ /index.html;
        # This will allow you to refresh page in your angular app. Which will not give error 404.

    }

  # proxy pass
  location /api/ {
       proxy_pass    http://127.0.0.1:4000/;
     }
     
  # Sub folder
  location /other {
    alias  /var/other/other/dist;
    try_files $uri /other/index.html;
  }

}

WebSocket Proxy

location /xxx/xxx/ {
proxy_pass http://xx.xxx.xx:xxx/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
}