The Docker Hub REST API returns per-platform manifest digests, while
docker image inspect RepoDigests stores the manifest list digest.
These two values never match, causing update_available to always be
True even after a fresh pull.
Fix: use registry-1.docker.io/v2/{name}/manifests/{tag} with anonymous
auth and read the Docker-Content-Digest response header, which is the
exact same digest that docker pull stores in RepoDigests.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- New image_service.py: Docker Hub digest check (no pull), local digest/ID
comparison, pull_all_images, per-customer container image status, and
update_customer_containers (docker compose up -d, data-safe)
- Monitoring endpoints: GET /images/check (hub vs local + per-customer
needs_update), POST /images/pull (background), POST /customers/update-all
- Deployment endpoint: POST /{id}/update-images (single-customer update)
- Monitoring page: "NetBird Container Updates" card with Check / Pull / Update
All buttons; image status table and per-customer update table with inline
update buttons
- i18n: added keys in en.json and de.json
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
