feat: Add GitHub Action for Dockerfile release update and slack notification

[mamu0]

List of Changes

1. Adding the GitHub Action.
2. Added the release.json file, which contain the values of the latest release. This variables are used to store the tag and SHA of the latest installed version.

   {
     "current_tag": "vX.Y.Z",
     "current_sha": "XXXXXX"
   }
   

3. Making a minor fix to the .gitignore file.
4. Enabling “Allow GitHub Actions to create and approve pull requests” in Repository Settings -> Actions -> General.
5. Added a variable for SLACK WEBOOK SECRET to use inside the workflow

Motivation and Context

This PR aims to create a GitHub Action that checks if a new release has been published on the repository https://github.com/actions/runner. If a new release is found, the action retrieves the necessary information to update the FROM directive in the Dockerfile to reference the new release.

Additionally, a changelog has been added, which is an MD file that keeps track of the versions that have been installed over time.

How Has This Been Tested?

This has been tested by running the action multiple times to verify that the values were correct. The PR generation part has been tested in a private repository.

Screenshots (if appropriate):

Types of changes

• Chore (nothing changes by a user perspective)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[pasqualedevita]

for slack notification you can also use github integration with summary. This not realtime but I think that one or two trigger per day can be enough

Less code is better :)

[Krusty93]

for slack notification you can also use github integration with summary. This not realtime but I think that one or two trigger per day can be enough

Less code is better :)

Does it send an email everyday or only if there is at least a PR?

[pasqualedevita]

thanks @mamu0 very useful improvement :)))