Add pgAdmin container for development purposes

[thinkh]

We should prepare a pgAdmin container for development purposes in the docker-compose.partial.yml. The container should be commented out by default, so that developers can activate them on demand.

In the following a sample config that can be adapted.

  pgadmin:
    links:
      - db_publicdb:publicdb
    image: dpage/pgadmin4:latest
    ports:
      - "5050:80"
    environment:
      - PGADMIN_DEFAULT_EMAIL=admin
      - PGADMIN_DEFAULT_PASSWORD=admin
    networks:
      - db_publicdb

[Deleted user]

we make it opposite: you can enable the pgadmin; https://wiki.datavisyn.io/internal/projects/jamborees/workspace