Hi Simen
Many thanks for this post.
Just one question. I've tried to change the port number with no success. Have you ever managed to serve dockerized strapi v4 on a port other than 1337? If so, have you employed anything else on top of the below settings?
.env
PORT=3024
docker-compose.yml
...
ports:
- "${PORT}:${PORT}"
...
I've changed both side of the ports' config as strapi runs on the port set in .env.
Following start strapi, the login panel shows up, but clicking the log in button returns with internal server error (500).