Adds a new docker image: `ytdl-sub-gui:latest` which is ytdl-sub packaged with VS-Code via LinuxServer.io's code-server image: https://hub.docker.com/r/linuxserver/code-server
Proper documentation will be added later
* post only if > 0
* since todays date
* pypi workflow
* test token
* fix test
* long description
* simpler names
* more simple
* no test pypi in master
* publish only on master
* [BACKEND] Set python __version__ as date, dynamically update it in make
* set version dynamically
* keep empty
* git ignore __init__
* keep init
* keep
* fix unit test
