WiP: Move mainpage to docker

[rasovica]

I still have to fix the django part.

[mitjajez]

I tried to build docker container (docker-compose build) but i saw worning:
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support

and it ended with error:
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You are running Setuptools on Python 2, which is no longer
supported and
>>> SETUPTOOLS WILL STOP WORKING <<<
in a subsequent release (no sooner than 2020-04-20).
Please ensure you are installing
Setuptools using pip 9.x or later or pin to setuptools<45
in your environment.
If you have done those things and are still encountering
this message, please follow up at
https://bit.ly/setuptools-py2-warning.
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