This folder contains the Google Firebase scripts for the code.angularjs.org setup.
firebase.json contains the rewrite rules that route every subdirectory request to the cloud function in functions/index.js that serves the docs from the Firebase Google Cloud Storage bucket.
functions/index.js also contains a rule that deletes outdated build zip files from the snapshot and snapshot-stable folders when new zip files are uploaded.
The deployment to the Google Cloud Storage bucket happens automatically via CI. See the .circleci/config.yml file in the repository root.
See /readme.firebase.docs.md for the firebase deployment to docs.angularjs.org