Compass-interface

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Added ``requirements.txt`` for pip as an alternative to conda.

Simplified dockerfile.

.. note:: **compass-interface-core** initially branched from this point.

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Unify project descriptions between FastAPI and README.

Added initial docker support with a dockerfile for the backend and settings for
docker-compose to run the full API and associated services.

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Added project metadata to FastAPI for better automatic documentation.

Updated README with more project information.

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Moved redis lifetime handling into ``api.utility.redis_handler``.

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Created ``compass.settings.Settings``.

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Moved compass authorisation header logic to ``compass.logon``.