OpenProject all in one image with Docker compose
For reasons, the official docs at https://www.openproject.org/docs/installation-and-operations/installation/docker/#quick-start do not include a simple example of starting OpenProject via compose, as a single image.
That missing file is below. Replace the left hand side of volumes with your own paths, adjust OPENPROJECT_HOST__NAME and enter an actual SECRET_KEY_BASE value from openssl rand -hex 64.