Expose your local http service to public network with ssh tunnel
ssh -R /:localhost:80 -p 1022 app.pywebio.online
This command will give you an entrypoint, which you can use to access your http://localhost:80
in public network.
To expose other local http service, change the localhost:80
part of the command to your local http service address.
If you want build your own tunnel service, refer to this doc.