Made with stolen parts from dencold/pgcli-docker & pygmy/alpine-tini:3.7. See https://stackoverflow.com/a/47871121 on alpine's packages for building pg_config.

• Based on python:3.8.1-alpine3.11, pgcli 2.2.0
• pip install flags & explicit package versions pinned to minimum requirements.