[add] Github Actions

[T0biii]

• adds Github Actions that runs the build command, and reports if there is an error in the Build process

[waldekmastykarz]

Thank you for the suggestion. We're not changing the Dockerfile that often and when we do, we validate it locally before committing. This is why we won't be using an automated validation step at this moment. If need arises in the future, we'll definitely consider it.