fix: remove source from image and guide and assert through volume mounting

[rlmestre]

No description provided.

[Copilot]

Pull Request Overview

This PR modifies the Docker image configuration to remove source code from the image and instead require volume mounting for scanning. The changes introduce a validation mechanism to ensure proper volume mounting and add CI/CD support for publishing container images.

Key changes:

• Replaced direct source copying with a mount validation script
• Added GitHub Actions workflow for automated image publishing
• Updated documentation with Docker usage instructions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
ci/image.Dockerfile	Removes source copying and adds custom entrypoint script
ci/docker-entrypoint.sh	New validation script that ensures volume mounting before scanning
README.md	Adds Docker usage documentation and removes empty line
.github/workflows/ci.yml	Adds automated image publishing workflow

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