patch #104

	# Github Setup:
	# 1. settings > pages > branch > pages/root
	# 2. settings > actions > general > workflow permissions > read and write permissions
	# 3. (optional) in `pages` branch create `index.html` with redirect to `/docs`
	name: 🌍 Deploy Book
	on:
	push:
	branches: main
	paths: [
	'docs/**',
	'.github/workflows/book.yml',
	]
	jobs:
	deploy:
	name: Build and Deploy
	runs-on: ubuntu-20.04
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	steps:
	- name: 📂 Checkout
	uses: actions/checkout@v4
	- name: 📂 Cache
	uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/bin/
	~/.cargo/registry/index/
	~/.cargo/registry/cache/
	~/.cargo/git/db/
	target/
	key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
	- name: 🔨 Install mdbook
	uses: peaceiris/actions-mdbook@v1
	with:
	mdbook-version: '0.4.34'
	- name: 🔨 Install mdbook-mermaid
	uses: baptiste0928/cargo-install@v2
	with:
	crate: mdbook-mermaid
	version: '0.12.6'
	- name: 🔨 Build Book
	run: mdbook build
	working-directory: ./docs
	- name: 🌍 Deploy
	uses: peaceiris/actions-gh-pages@v3
	if: ${{ github.ref == 'refs/heads/main' }}
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_branch: pages
	publish_dir: ./docs/book
	# destination_dir: docs

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