A minimal setup to run a Nextcloud inside the TLS-enabled docker development stack.

First installation steps

1. Allow accessing OP through openproject.local:
   • docker compose exec --user www-data nextcloud php occ config:system:set allow_local_remote_servers --value 1
   • If using an alternative hostname: docker compose exec --user www-data nextcloud php occ config:system:set trusted_domains 1 --value=nextcloud.example.com
2. Import Dev CA cert into Nextcloud's own certificate store:
   • docker compose cp /path/to/your/OpenProject_Development_Root_CA.crt nextcloud:/tmp/root.crt
   • docker compose exec nextcloud chown www-data /tmp/root.crt
   • docker compose exec --user www-data nextcloud php occ security:certificates:import /tmp/root.crt
3. Configure Traefik as trusted proxy
   • e.g. docker compose exec --user www-data nextcloud php occ config:system:set trusted_proxies 2 --value=172.0.0.0/8 for a pretty broad allowance for most docker services (verify that your gateway network uses IPs in the given address range)
4. Download/Activate Nextcloud plugins:
   • integration_openproject
   • groupfolders (dependency for certain OP functions)