GitHub Action: Build & Push Docker Image to quay.io, docker.io, ghcr.io

[Copilot]

This PR implements a comprehensive GitHub Action workflow to automatically build and push Docker images to multiple container registries on every push to the main branch.

Changes Made

1. Created .github/workflows/docker-build.yml

• Triggers on pushes to main branch only
• Authenticates to all three registries using GitHub secrets:
  • Docker Hub (docker.io/cniweb/xmrig)
  • GitHub Container Registry (ghcr.io/cniweb/xmrig)
  • Quay.io (quay.io/cniweb/xmrig)
• Tags images with both latest and commit SHA (${{ github.sha }})
• Uses the existing build.sh script for building

2. Enhanced build.sh Script

• Added support for build-only parameter to enable CI/CD usage
• Maintains full backward compatibility for existing workflows
• When called with ./build.sh build-only, builds the image but skips registry pushes

3. Updated README.md

• Added build status badge for the new workflow
• Enhanced registry documentation with clear usage examples
• Added information about available tags (latest, <commit-sha>, version-specific)
• Improved formatting and organization

Workflow Features

The workflow performs the following steps:

1. Checkout code
2. Authenticate to all three container registries
3. Build Docker image using existing build.sh script in build-only mode
4. Tag image for all registries with both latest and commit SHA
5. Push tagged images to all three registries

Required Secrets

The following GitHub secrets need to be configured for the workflow to function:

• DOCKERHUB_USERNAME and DOCKERHUB_TOKEN
• GHCR_USERNAME and GHCR_TOKEN
• QUAY_USERNAME and QUAY_PASSWORD

Benefits

• Automated CI/CD: Images are automatically built and pushed on every main branch commit
• Multi-registry support: Images available on Docker Hub, GHCR, and Quay.io for redundancy
• Version tracking: Each commit gets its own tagged image for easy rollbacks
• Backward compatibility: Existing build.sh usage remains unchanged

Fixes #17.

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[cniweb]

@copilot Tag images with both latest and as version (Parameter $version from build.sh)

[Copilot]

@copilot Tag images with both latest and as version (Parameter $version from build.sh)

Updated the workflow to tag images with version from build.sh parameter. The workflow now extracts the version dynamically and tags images with latest, version (6.22.2), and commit SHA across all registries. Commit: 59c478b

[cniweb]

LGTM