Web server port and IP should be configurable

[satel-kalletuulos]

Is your feature request related to a problem? Please describe. In the current (2021-08-02 version) web_app/server.py, web server port is hard coded to 0.0.0.0 with standard http port i.e. 80: line 759: socketio.run(app, host = "0.0.0.0", port = 80)

Describe the solution you'd like Both web server port and address should be configurable in settings.conf file.

Describe alternatives you've considered The file settings.conf would have two additional entries, for example:

web_app_port=80
web_app_ip=0.0.0.0

Additional context

[by]

Alternatively, please keep at least 80 free and use 8008 or any other alternative http port, thanks!

[by]

Provided pull request: https://github.com/Stefal/rtkbase/pull/202