Upgrade postgres to a supported version (16?)

[alexlovelltroy]

Postgres 11 is no longer supported. We should be able to upgrade to Postgres 16 and get back on a supported platform.

deployment-recipes/quickstart/postgres.yml

Line 6 in 45a743e

image: postgres:11.5-alpine

I tried to drop in the new postgres container, but something seems to have changed with the way permissions work because I the migration containers report permission errors on 16.

We need to figure out what has changed and update the script that manages users and databases for us: [multi-psql-db.sh)(quickstart/pg-init/multi-psql-db.sh)