nginx_conf

server {
        listen 443;
        ssl on;
        ssl_certificate /var/www/wsApp/config/sslcerts/cert.pem;
        ssl_certificate_key /var/www/wsApp/config/sslcerts/key.pem;
        server_name localhost;

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

        location ~ ^/(images/|img/|javascript/|js/|css/|stylesheets/|flash/|media/|static/|robots.txt|humans.txt|favicon.ico) {
                root /var/www/wsApp/public;
                access_log off;
                expires max;
        }

        location / {
                proxy_pass http://localhost:3000;
                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;
        }
}