Add dozzle.dev devcontainer feature

[Copilot]

Adds a devcontainer feature to install the dozzle binary — a lightweight Docker log monitoring web UI.

Why non-trivial

Dozzle ships no GitHub release binaries — only Docker Hub images (amir20/dozzle). The install script works around this by speaking directly to the Docker Hub OCI registry API using only curl+tar, with no Docker daemon required.

Install approach

1. Fetch a pull token from auth.docker.io
2. Resolve the multi-arch index manifest for the requested tag (latest or v{X.Y.Z})
3. Find the arch-specific manifest digest (handles amd64, arm64, armhf, etc.)
4. Extract the largest image layer — which, for this FROM scratch image, contains only the statically-linked dozzle binary
5. Stream-extract to /usr/local/bin/dozzle

Changes

• src/dozzle.dev/devcontainer-feature.json — feature definition with version option (latest or X.Y.Z)
• src/dozzle.dev/install.sh — OCI registry-based install, follows existing repo conventions
• test/dozzle.dev/test.sh — verifies binary exists at /usr/local/bin/dozzle
• .github/workflows/test.yaml — adds dozzle.dev to both test-autogenerated and test-scenarios matrices

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:

• dozzle.dev
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• https://api.github.com/repos/amir20/dozzle/releases
  • Triggering command: /usr/bin/curl curl -s REDACTED -H Accept: application/vnd.github+json ad_url']) for a in rel['assets']] (http block)
  • Triggering command: /usr/bin/curl curl -v REDACTED (http block)
• https://api.github.com/repos/amir20/dozzle/releases/294909104/assets
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/amir20/dozzle/releases/latest
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/amir20/dozzle/releases/tags/v10.1.1
  • Triggering command: /usr/bin/curl curl -s REDACTED conntrack --ctstate INVALID,NEW -j DROP (http 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

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This section details on the original issue you should resolve

<issue_title>Add feature dozzle.dev</issue_title>
<issue_description>Files:

src/pi.dev/devcontainer-feature.json
src/pi.dev/install.sh (make sure to set executable bit)
test/pi.dev/test.sh
.github/workflows/test.yaml

Releases:

https://github.com/amir20/dozzle/releases</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add feature dozzle.dev #38

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