thank you we are trying to it easy for everyone to do it.
The default server shipped with the project is using aiohttp, you need to install python3 and all dependencies in the remote server.
Once you have done that you can run the demo by using this command:
python3 -m wolframwebengine --demo
this will effectively start the aiohttp application, then you can follow the official instructions to deploy the application on production using nginx.
If you want to use django (maybe because you also want to use python), there is one example in the repo.
I hope this will help.