Dev database docker block has no way to set connection details

[icopp]

This means that things break as soon as you use any Docker image that doesn't use the default assumption for username/password/etc for initial setup, like the Supabase Postgres image (which uses the user supabase_admin for initial bootstrapping and postgres for more limited runtime access).

There's a very janky workaround for the Supabase use case, which is to make a Dockerfile like so:

# Dockerfile

FROM supabase/postgres:15.6.1.132

COPY override-permissions.sql /docker-entrypoint-initdb.d/migrations/99999999999999-override-permissions.sql

-- override-permissions.sql
ALTER USER postgres WITH SUPERUSER;

Not great, though.