Due to having to expose local developments (in progress) publicly to interact with other third party services or to show them to other programmers I usually use ngrok in the free tier... Which is an absolute mess because it changes the URL on each command (nevertheless it works out of the box and very fast)...

I have also tried Localtunnel which it's great but hangs a lot. Anybody knows any self-hosted solution that giving a domain of my own can I expose via tunnels in subdomains?