Document release process

[jpraynaud]

Why

We want to document the process to release a new official version of the DMQ node.

What

Document the steps needed to create a pre-release and a release

How

• Document the creation of a pre-release (with a new tag)
  • Creation of a GitHub release with static binaries
  • Creation of a Docker image
  • Publication to CHaP
• Document the steps needed to qualify a pre-release
• Document the steps to officially promote a pre-release to a release
  • Promotion of a GitHub release in pre-release
  • Promotion of a Docker image
  • Promotion of a CHaP package
• Document creation of a hotfix