As a user with a UID other than 1000, you have permissions issues with files.
The variables are automatically changed in start.sh for .env. But ultimately have to be handed over docker-compose.yml.
Required: APPLICATION_UID & APPLICATION_GID
docker-compose.yml:
services:
web:
environment:
# Set user and group id
- APPLICATION_UID=${APPLICATION_UID:-1000}
- APPLICATION_GID=${APPLICATION_GID:-1000}