Nginx

#acme
location ^~/.well-known {
    default_type "text/plain";
    root /var/www/html;
}
events {
	worker_connections 768;   #10000                                            Load balancer
	multi_accept on;
}
#Load balancer redirect http to https and http to www-version
server {
    listen 80 default_server;
	server_name prod.safepalapp.com;
	return 301 https://www.prod.safepalapp.com$request_uri;
}
#Load balancer
server {
    listen 80;
	server_name www.prod.safepalapp.com;
	root /var/www/safepal/public;
	passenger_app_env production;
	passenger_enabled on;
	passenger_ruby /home/ubuntu/.rvm/gems/ruby-2.4.0@safepal/wrappers/ruby;
	location /health {
		return 200 "healthy\n";
	}
	include acme;
	if ($http_x_forwarded_proto = 'http'){
        return 301 https://www.prod.safepalapp.com$request_uri;
    }
    location ~ ^/(assets|fonts|images|javascripts|firebase-messaging-sw.js|manifest.json|robots.txt) {
		gzip_static on;
		expires max;
		add_header Cache-Control public;
    }
	location / {
        proxy_intercept_errors on;
		error_page 404 404.html;
		error_page 422 422.html;
		error_page 500 500.html;
	}
    location /socket {
		client_max_body_size 10m;
		passenger_app_group_name safepal_action_cable;
		passenger_force_max_concurrent_requests_per_process 0;
    }
}
#Singleton redirect http to https and http to www-version
server {
    listen 80 default_server;
    server_name safepal.tk www.safepal.tk;
    return 301 https://www.safepal.tk$request_uri;
}
#Singleton redirect https to www-version
server {
    ssl on;
    listen 443 default_server;
    server_name safepal.tk;
    return 301 https://www.safepal.tk$request_uri;
}
#Singleton
server {
    ssl     on;
    listen 443;
    server_name www.safepal.tk;
    root /var/www/safepal/public;
    passenger_app_env production;
    passenger_enabled on;
    passenger_ruby /home/ubuntu/.rvm/gems/ruby-2.4.0@safepal/wrappers/ruby;
    
    include acme;
    
    location / {
        proxy_intercept_errors on;
    	error_page 404 404.html;
    	error_page 422 422.html;
    	error_page 500 500.html;
    }
    
    location ~ ^/(assets|fonts|images|javascripts|firebase-messaging-sw.js|manifest.json|robots.txt) {
	    gzip_static on;
	    expires max;
	    add_header Cache-Control public;
    }
}
#Singleton custom WebScoket
server {
    ssl     on;
    listen 8433;
    server_name www.safepal.tk;
    root /var/www/safepal/public;
    passenger_app_env production;
    passenger_enabled on;
    passenger_app_group_name safepal_action_cable;
    passenger_app_type rack;
    passenger_startup_file cable/config.ru;
    passenger_force_max_concurrent_requests_per_process 0;
}
##
# Basic Settings
##
       
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;           #86400                                          Load balancer
keepalive_requests 100;         #10000                                          Load balancer
client_header_timeout 10;       #remove                                         Load balancer
client_body_timeout 10;
reset_timedout_connection on;
send_timeout 2;
types_hash_max_size 2048;
server_tokens off;
absolute_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
client_max_body_size 500m;
##
# Gzip Settings
##
open_file_cache max=200000 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 2;
open_file_cache_errors on;
gzip on;
gzip_disable "msie6";
gzip_vary on;
gzip_proxied any;
gzip_comp_level 8;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_min_length 256;
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript;	
##
# SSL Settings
##
ssl_protocols		SSLv3 TLSv1;
ssl_certificate		/etc/letsencrypt/live/safepal.tk/fullchain.pem;
ssl_certificate_key	/etc/letsencrypt/live/safepal.tk/privkey.pem;
    
# Improve HTTPS performance with session resumption
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 5m;
# Enable server-side protection against BEAST attacks
ssl_prefer_server_ciphers on;
ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DH+3DES:!ADH:!AECDH:!MD5;
# Disable SSLv3
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
# Diffie-Hellman parameter for DHE ciphersuites
# $ sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 4096
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
# Enable HSTS (https://developer.mozilla.org/en-US/docs/Security/HTTP_Strict_Transport_Security)
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";  
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
# Enable OCSP stapling (http://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox)
ssl_stapling on;
ssl_stapling_verify on;
ssl_trusted_certificate /etc/letsencrypt/live/safepal.tk/fullchain.pem;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;