openGym

name: opengym

services:
  # One-time: download the exercise images + GIFs into ./media (skipped if already there).
  # ~140 MB, from github.com/hasaneyldrm/exercises-dataset. That dataset is MIT for the
  # metadata and instruction text, but the images and GIFs are © Gym visual
  # (https://gymvisual.com/) and are used under the dataset's terms — openGym neither
  # redistributes nor relicenses them. See NOTICE.md.
  media:
    image: alpine/git
    volumes:
      - ./media/img:/out/img
      - ./media/gif:/out/gif
    entrypoint: ["/bin/sh", "-c"]
    command:
      - |
        if [ -z "$$(ls -A /out/img 2>/dev/null)" ]; then
          echo "↓ Downloading exercise media (~140 MB, one time)…"
          echo "  Source:  github.com/hasaneyldrm/exercises-dataset"
          echo "  Metadata and instruction text: MIT."
# ...