Le script docker-compose.yaml se base sur une Debian stretch.
Ce n'est pas grave en soi, sauf qu'il installe des gems qui ne sont plus disponibles et donc la commande docker-compose up
ne marche pas:
Your bundle is locked to mimemagic (0.3.5) from rubygems repository
https://rubygems.org/ or installed locally, but that version can no longer be
found in that source. That means the author of mimemagic (0.3.5) has removed it.
You'll need to update your bundle to a version other than
(…)