ref(docker): use cache mounts for build cache #1056

	# Workflow patches for skipping Google Cloud docs updates when docs, Rust code, or dependencies
	# aren't modified in a PR.
	name: Docs

	# Run on PRs with unmodified docs, code, and dependency files.
	on:
	pull_request:
	paths-ignore:
	# doc source files
	- 'book/**'
	- '**/firebase.json'
	- '**/.firebaserc'
	- 'katex-header.html'
	# rustdoc source files
	- '*/.rs'
	- '**/Cargo.toml'
	- '**/Cargo.lock'
	# configuration files
	- '.cargo/config.toml'
	- '**/clippy.toml'
	# workflow definitions
	- '.github/workflows/docs-deploy-firebase.yml'

	# IMPORTANT
	#
	# The job names in `docs-deploy-firebase.yml`, `docs-deploy-firebase.patch.yml` and
	# `docs-deploy-firebase.patch-external.yml` must be kept in sync.
	jobs:
	build-docs-book:
	name: Build and Deploy Zebra Book Docs
	runs-on: ubuntu-latest
	steps:
	- run: 'echo "No build required"'

	build-docs-internal:
	name: Build and Deploy Zebra Internal Docs
	runs-on: ubuntu-latest
	steps:
	- run: 'echo "No build required"'

Provide feedback