Check for database without using postgres-client

[maxking]

Remove the additional dependency of postgres-client in the images. It is possible check for it by just using psycopg2 in the python.

I am not sure though if we should add more python code to maintain or just rely on the postgres-client.

[maxking]

I think this does make sense and I am going to do that soon in both core and web images.

[github-actions[bot]]

This issue has not been updated for more than 1year