For a month or so images haven’t been loading in Tandoor. This is likely due to a missing web server to serve media files. You can restore the old behaviour by setting GUNICORN_MEDIA to 1 as an environment variable, but that isn’t the recommended configuration any more. Instead one is supposed to add a nginx server to serve image files, even in a local network.
See also this GitHub issue for more context: Images not loading · Issue #3617 · TandoorRecipes/recipes · GitHub
And this part of the documentation: Docker - Tandoor Recipes