nginx_conf

server {

        location ~ /.well-known {
                allow all;
        }

        listen 80 default_server;
        listen [::]:80 default_server;
        server_name mydomain.com;
        return 301 https://$server_name$request_uri;
}

server {
        listen 443 ssl http2 default_server;
        listen [::]:443 ssl http2 default_server;
        include snippets/ssl-mydomain.com.conf;
        include snippets/ssl-params.conf;

        root /var/www/html;

        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ =404;
                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;
        }

        location /dash {
                proxy_pass http://localhost:3000;
        }
                location ~^/(images/|img/|javascripts/|js/|css/|stylesheets/|flash/|media/|static/|robots.txt|humans.txt|favicon.ico) {
          root /var/www/html/public;
          access_log off;
          expires max;
        }

}