Description

Improve GitLab Pages deployment

Additional context

The cp -a dist/. public/ copies all stuff from build out dir to the GitLab required public folder.
That way on normal build locally you can still gitignore dist folder and no content was emitted/build to public folder.

I also updated some stuff like default branch and node image

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.