Added erddap persistent volume to the helm chart so the api can get hold of the individual activity grids to build dynamic downloads. Also upgraded flask to 2.0.1 to get past the error shown below that occurred during startup - the solution was on the stackoverflow: https://stackoverflow.com/questions/71189819/python-docker-importerror-cannot-import-name-json-from-itsdangerous The error was: ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)