Basic Nginx config file

nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
  worker_connections 768;
  multi_accept on;
}

http {

  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  types_hash_max_size 2048;

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

  ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
  ssl_prefer_server_ciphers on;

  access_log /var/log/nginx/access.log;
  error_log /var/log/nginx/error.log;

  gzip on;
  gzip_disable "msie6";
  gzip_vary on;
  gzip_proxied any;
  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

  proxy_cache_path /tmp/nginx levels=1:2 inactive=60m;
  proxy_cache_key "$scheme$request_method$host$request_uri";

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

  upstream <UPSTREAM_NAME> {
     server <IP1>:<PORT>;
     server <IP2>:<PORT>;
     server <IPN>:<PORT>;
  }

  server {
    listen 80;
    server_name example.com;

    location /.well-known/acme-challenge/ {
      root /path/to/https/certs;
    }

    location / {
      # To redirect all http request to https
      return 301 https://$host$request_uri;
    }
  }

  server {
    listen 443 ssl;
    server_name example.com;
    
    include includes/ssl-settings.conf;    
    include includes/assets-settings.conf;
    include includes/static-settings.conf;
    include includes/home-settings.conf;    
    
    location / {
      proxy_pass http://<UPSTREAM_NAME>;
      proxy_set_header X-Real-IP  $remote_addr;

      proxy_set_header  Host $host;
      proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header  X-Forwarded-Proto $scheme;
      proxy_set_header  X-Forwarded-Ssl on; # Optional
      proxy_set_header  X-Forwarded-Port $server_port;
      proxy_set_header  X-Forwarded-Host $host;
    }
  }
}