Add Docker support and change configuration to be taken from env vars

[grigal]

• Added docker support
• Configuration from environment variables
• Required configuration validation
• Removed unneeded dependencies
• Added logging to console, rather than file

[f1shl]

Thanks for the Docker integration!
Why not leaving the Config file as an additional method to set the necessary parameters?
With the docker container, environment variables makes totally sense!

[FrancYescO]

maybe just replace the .ini file with a .env and load it from py for who still want to run without docker

[ducphu0ng]

Is there any update? Since I haven't seen the PR merged, I wrote my own Docker-based script to avoid differences in outcomes across systems. If you're interested, you can check it out here: https://github.com/ducphu0ng/imap-netflix-household-automation