Use official Docker Actions

[lucacome]

This pull request includes significant updates to the CI/CD pipeline and a minor optimization in the Dockerfile. The most important changes involve improving the Docker build process.

CI/CD pipeline updates:

• .github/workflows/publish.yml: Updated the workflow to use Docker actions for metadata, QEMU setup, and build-push operations.

Dockerfile optimization:

• Dockerfile: Added the -trimpath flag to the Go build command.

[jacobtomlinson]

Thanks for these improvements. Definitely good to get onto the official actions.