Default nginx configuration for Rails in /etc/nginx/sites-available/default with Unicorn

nginx conf for rails

upstream app {
    # Path to Unicorn SOCK file, as defined previously
    server unix:/var/www/APP_NAME/shared/sockets/unicorn.sock fail_timeout=0;
}

server {
	listen 80;
	#listen [::]:80 default_server ipv6only=on;

	root /var/www/APP_NAME/public;

	# Make site accessible from http://localhost/
	server_name DOMAIN www.DOMAIN;

	try_files $uri/index.html $uri @app;

	location @app{
        	proxy_pass http://app;
	        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	        proxy_set_header Host $http_host;
        	proxy_redirect off;
    	}

	if ($http_x_forwarded_proto = "http") {
		return 301 
		https://$server_name$request_uri;
	}

	error_page 500 502 503 504 /500.html;
	client_max_body_size 4G;
	keepalive_timeout 10;
}