nginx.conf

upstream app {
        server 127.0.0.1:3000;
        keepalive 16;
}

server {
        listen 0.0.0.0:80;
        server_name app.com www.app.com;
        access_log /var/log/nginx/themixrapp.log;

        root /var/www/mixr-new/public/;
        index index.html index.htm;

        location / {
                root /var/www/mixr-new/public/;
                index index.html index.htm;

                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $http_host;
                proxy_set_header X-NginX-Proxy true;

                proxy_pass http://themixrapp;
                proxy_redirect off;

                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";

        }
}