nginx.config

upstream backend {
    server 127.0.0.1:3000;
}

# HTTPS Server
server {
    listen external.ip.address ssl http2;
    server_name chat.myserver.com

    # You can increase the limit if your need to.
    client_max_body_size 200M;
    access_log /var/log/nginx/rocketchat.access.log;
    error_log /var/log/nginx/rocketchat.error.log;

    ssl on;
    #ssl_certificate /etc/nginx/certificate.crt;
    #ssl_certificate_key /etc/nginx/certificate.key;
    ssl_certificate /etc/dehydrated/certs/myserver.com/fullchain.pem;
    ssl_certificate_key /etc/dehydrated/certs/myserver.com/privkey.pem;
    ssl_trusted_certificate /etc/dehydrated/certs/myserver.com/chain.pem;
    
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # don’t use SSLv3 ref: POODLE

    location / {
        proxy_pass http://backend/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $http_host;

        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forward-Proto http;
        proxy_set_header X-Nginx-Proxy true;

        proxy_redirect off;
    }
}