Issue#27 py csw single microservice

[mwallschlaeger]

Description

Reinitialized PR. Had a problem with git on the old branch. old PR: #34

ref #27

added pycsw microservice inspired by pycsw helm chart (https://github.com/geopython/pycsw/tree/master/docker/helm) with adoption to the style of this helm chart.

Implementation:

nginx container forwarding traffic to pycsw via .Values.pycsw.endpoint url
mappings.py taken from GeoNode codbase (https://github.com/GeoNode/geonode/blob/master/geonode/catalogue/backends/pycsw_local_mappings.py)
pycsw.cfg taken from pycsw helm chart

Type of Change

Please select the relevant option:

• [ ] Bug fix
• [x] New feature
• [x] Documentation update
• [x] Refactoring
• [ ] Other (please describe)

Related Issue

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closes #27

Checklist

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• The feature or bug fix has been discussed and documented in an issue beforehand.

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