Gitpod lefthook tools

When trying to force push rebased MR from Gitpod, the following checks fail. Need to ensure that tools are installed in Gitpod image.

🥊  yamllint-tests
🥊  shellcheck-tests
🥊  hadolint-tests
🥊  rubocop-tests
🥊  rspec-tests
🥊  navigation-checks