Workflow for publishing image #29
                
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This pull request adds a new GitHub Actions workflow to automate the publishing of Docker images when changes are merged into the
mainbranch or a release is published. The workflow builds the Docker image, tags it appropriately, and pushes it to GitHub Container Registry.Continuous integration and deployment:
.github/workflows/publish-image.ymlto define a workflow that builds and pushes Docker images to GitHub Container Registry (ghcr.io) on pull requests tomainand on release publication.linux/amd64andlinux/arm64, and set up caching to speed up builds.