Simplify docker compose

[BasementCat]

Based on suggestions in #16:

Create 2 docker compose files - one for development (default, docker-compose.yaml) and another for production (like docker-compose-prod.yaml) - can run docker compose up -d -f docker-compose.yaml docker-compose-prod.yaml to bring up the prod version.

Dev:

• Remove nginx (and config file), run uwsgi on port 8000 via http
• Update internal web host env var
• Add additional configuration, like bootstrap local serving
• Maintain image building & mounted dir

Prod:

• Override image to use GHCR latest
• Remove mounted dir