Add comics container (jodal/comics)

[davralin]

Adds a container build for jodal/comics — a web comics aggregator by Stein Magnus Jodal.

What's included

• comics/Dockerfile — multi-stage build using uv, based on the upstream draft PR #373
• comics/entrypoint.sh — runs migrations then starts gunicorn on port 8000

Still needed

The GitHub Actions workflow file (comics.yml) could not be pushed due to token scope. Add .github/workflows/comics.yml:

name: comics

on:
  push:
    branches:
      - "main"

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
      - name: Login to Docker Hub
        uses: docker/login-action@v4
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.LOCAL_GITHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          context: comics/
          platforms: linux/amd64,linux/arm64
          push: true
          tags: |
            davralin/comics:latest
            ghcr.io/davralin/comics:latest

Container details

• Base: python:3.12-slim-bookworm
• Build: uv (matches upstream tooling), clones from main branch
• Extras: pgsql, server, cache, api (all optional deps)
• Runtime: gunicorn on port 8000, non-root (UID 1000)
• Env vars: DATABASE_URL, PORT (default 8000), DJANGO_STATIC_ROOT, DJANGO_MEDIA_ROOT