Mount NAS docker dir into job container

Allows git clone, .env write and docker compose to operate
on the actual NAS filesystem, not the container's tmpfs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -9,6 +9,7 @@ jobs:
     runs-on: self-hosted
     container:
       image: docker:latest
+      options: -v /volume2/docker:/volume2/docker
 
     steps:
       - name: Pull code