[NginX] How to reverse proxy your internal web application server(s) using Nginx

nginx.conf

# This file is usually placed in this following path: /etc/nginx

user  nginx;
#user   root;

worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip  on;
    gzip_comp_level 6;
    gzip_vary on;
    gzip_min_length 1000;
    gzip_proxied any;
    gzip_types image/gif image/png text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_buffers 16 8k;

    include /etc/nginx/conf.d/*.conf;
}

reverse-proxy.conf

# This file is usually placed in this following path: /etc/nginx/conf.d
 
# All requests to this nginx server would be load balanced to any server's IP addresses/domain names you write inside this block.
upstream your_application_upstream{
    server 192.1.6.55:8087; # The IP address+Port / fqdn of your web application server (e.g. www.yourawesomeapp.com)
# add more web application server(s)'s IP/domain name here as you like. 
}
 
server {
    listen       80;
    server_name  my.nginx-reverse-proxy.io nginx-reverse-proxy.io;
 
    location /{
        proxy_pass http://your_application_upstream; # notice that the value of this property points to the upstream block's name.
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
 
        # Avoiding '503 Gateway timeout', pretty useful when you're debugging the web application(s) behind nginx.
        proxy_connect_timeout       600;
        proxy_send_timeout          600;
        proxy_read_timeout          600;
        send_timeout                600;
 
#        proxy_redirect off;
#        proxy_set_header X-Real-IP $remote_addr;
#        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
#        proxy_set_header X-Forwarded-Proto $scheme;
#        proxy_set_header Host $host;
#        proxy_set_header X-NginX-Proxy true;
#        proxy_set_header Connection "";
 
# ..and other tons of settings..
 
    }
}