Alternative to ngrok with Permanent subdomain using Nginx, SSL, and reverse SSH

dev.mydomain.com

# Nginx configuration file:
# /etc/nginx/sites-available/dev.mydomain.com  


# This block redirects non-ssl traffic to the ssl-version
server {
    if ($host = dev.mydomain.com) {                                             # replace with your mydomain
      return 301 https://$host$request_uri;
    }

    listen 80 ;
    listen [::]:80 ;
    server_name dev.mydomain.com;                                               # replace with your domain
    return 404;
}


# Main server configuration block
server {
    server_name dev.mydomain.com;                                               # replace with your domain
    listen [::]:443 ssl;
    listen 443 ssl;
    ssl_certificate /etc/letsencrypt/live/dev.mydomain.com/fullchain.pem;       # replace with certbot line
    ssl_certificate_key /etc/letsencrypt/live/dev.mydomain.com/privkey.pem;     # replace with certbot line
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    location / {
      proxy_pass http://127.0.0.1:30000;                                        # use a port that you like. 30000 is a good one.
    }
}