Add automated release workflow with Docker publishing

[Copilot]

Implements automated release builds triggered on version tags, publishing multi-platform Docker images to GitHub Container Registry and creating GitHub releases with build artifacts.

Workflow Features

• Trigger: Git tags matching v* (e.g., v0.2.0)
• Build pipeline: Tests → TypeScript build → verification → artifact creation
• Docker: Multi-platform images (amd64, arm64) pushed to ghcr.io/cdanis/odette
• Tagging strategy:
  • Exact version (v0.2.0)
  • Major.minor (0.2)
  • latest (stable releases only, excludes pre-releases like v1.0.0-beta)
• Release artifacts: Tarball containing dist/, views/, public/, and manifests
• Optional Docker Hub support: Commented out, ready to enable with secrets

Usage

# Tag and push to trigger release
git tag -a v0.2.0 -m "Release v0.2.0"
git push origin v0.2.0

# Pull published image
docker pull ghcr.io/cdanis/odette:latest

Documentation Updates

• README.md: Added pre-built Docker image instructions
• CONTRIBUTING.md: Documented release process and automation steps

Original prompt

Gh actions release build. Docker? Npm?

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[Copilot]

Pull request overview

This PR implements a comprehensive automated release workflow triggered by version tags (e.g., v0.2.0), publishing multi-platform Docker images to GitHub Container Registry and creating GitHub releases with build artifacts.

Changes:

• Added GitHub Actions workflow for automated releases on version tags
• Added pre-built Docker image usage instructions to README
• Documented the release process in CONTRIBUTING.md

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
.github/workflows/release.yml	Complete release automation workflow with tests, TypeScript build, Docker multi-platform publishing to GHCR, and GitHub release creation with artifacts
README.md	Added instructions for using pre-built Docker images from GHCR alongside existing local build instructions
CONTRIBUTING.md	Documented the automated release process with step-by-step instructions for maintainers