Replace deprecated rwgrim/docker-noop with internal build

[Copilot]

• Resolves: #

Summary

Docker removed support for Image Format v1 and manifest v2 schema 1, causing rwgrim/docker-noop pulls to fail on second run with:

Docker Image Format v1 and Docker Image manifest version 2, schema 1 support has been removed.

Replaced with internal ghcr.io/juliusknorr/nextcloud-dev-noop:latest built via GitHub Actions.

Changes:

• docker/noop/noop.c - Minimal C program (exit(0))
• docker/noop/Dockerfile - Multi-stage build compiling static binary into scratch image
• .github/workflows/docker.yml - Added noop to build matrix
• docker-compose.yml - Updated database-sqlite service image reference

Supports amd64/arm64, built automatically on push to master.

TODO

• Create noop implementation
• Add to CI/CD pipeline
• Update docker-compose reference

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• artifacts.elastic.co
  • Triggering command: /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Xms4m -Xmx64m -XX:+UseSerialGC -Des.cgroups.hierarchy.override=/ -Des.path.home=/usr/share/elasticsearch -Des.path.conf=/usr/share/elasticsearch/config -Des.distribution.flavor=default -Des.distribution.type=docker -cp /usr/share/elasticsearch/lib/*:/usr/share/elasticsearch/lib/tools/plugin-cli/* org.elasticsearch.plugins.cli.PluginCli install --batch ingest-attachment (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Unable to pull rwgrim/docker-noop</issue_title>
<issue_description>I am seeing this output when I run docker compose up for the second time:

[+] Running 3/175
 ⠇ database-pgsql [⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                 0.8s
 ⠏ appapi-dsp-https [⠀⣿⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                   0.8s
 ⠏ blackfire Pulling                                                                                                                                                                                                                      0.8s
 ⠏ database-oci [⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                          0.8s
 ⠏ pgadmin [⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                      0.8s
 ⠏ database-maxscale [⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                 0.8s
 ⠏ minio [⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                              0.8s
 ⠏ onlyoffice [⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                           0.8s
 ⠏ database-sqlite Pulling                                                                                                                                                                                                                0.8s
 ⠏ ldapadmin [⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                          0.8s
 ⠏ keycloak [⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                               0.8s
 ⠏ talk-recording [⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                        0.8s
 ⠏ previews_hpb [⠀⠀⠀⠀] Pulling                                                                                                                                                                                                            0.8s
 ⠏ collabora [⠀⠀⠀⠀] Pulling                                                                                                                                                                                                               0.8s
 ⠏ appapi-dsp [⠀]  36.9kB / 3.624MB Pulling                                                                                                                                                                                               0.8s
 ⠏ talk-signaling [⣿⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                                       0.8s
 ⠏ database-mariadb-primary Pulling                                                                                                                                                                                                       0.8s
 ⠏ tinyproxy [⠀⠀] Pulling                                                                                                                                                                                                                 0.8s
 ⠏ phpmyadmin [⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                              0.8s
 ⠏ imap [⠀⠀⠀⠀⠀⠀⠀] Pulling                                                                                                                                                                                ...

</details>

- Fixes juliusknorr/nextcloud-docker-dev#404

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