Fixed k8s setup for tandoor 2

[MyDigitalLife]

I'm running Tandoor in k8s with the default setup described in the documentation. As its not tested i noticed It didn't work after updating to Tandoor 2.

Checking the code the init container has the collectstatic_js_reverse command. The dependency that was needed was removed from the requirements.txt with the upgrade so it worked after removing the command in the init container.

Also added a extra link in the documentation as the location of the files is never disclosed in the documentation. Very confusing.

[CLAassistant]

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[MeneDev]

Can confirm I have it running like that now.

I haven't followed the v2 development, but isn't nginx now part of the image? A bit unclear to my, why we still need it?
When I look at the diff in 7ccdb90 for the "plain" docker-compose setup, I would expect quite a simplification here as well?

[vabene1111]

perfect, yes this command is no longer required. @MeneDev is correct, an additional nginx is no longer needed, users will only need a reverse proxy (if they want).

Do you want to review the setup regarding this or should I merge the current state?

Thanks for the PR :)