Review Apps for Android with GitLab, fastlane & Appetize.io

This post details the integration of Appetize.io with GitLab CI/CD and fastlane to create dynamic review apps for Android applications. It introduces a new `review` lane in fastlane to push apps to Appetize.io and update existing apps using a saved public key. The `.gitlab-ci.yml` is updated to include a `review` stage, define dynamic environment URLs using a `deploy.env` file, and implement an `on_stop` job to delete review apps from Appetize.io. This enables the creation and cleanup of review apps tied to specific branches.