lessons 03: fix comments, add questions in lesson, add example in Python #291

	name: Run linters and formatters

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:
	rust:
	runs-on: ubuntu-latest
	steps:
	- name: checkout
	uses: actions/checkout@v4
	- name: clippy
	run: cargo clippy --all-targets --all-features -- -D warnings
	- name: rustfmt
	run: cargo fmt --all --check
	- name: rust test
	run: cargo test --all-targets --all-features --no-fail-fast
	frontend:
	runs-on: ubuntu-latest
	steps:
	- name: checkout
	uses: actions/checkout@v4
	- name: setup node
	uses: actions/setup-node@v2
	- name: cache dependencies
	uses: actions/cache@v4
	with:
	path: ~/.npm
	key: npm-${{ hashFiles('package-lock.json') }}
	restore-keys: npm-
	- name: install dependencies
	run: npm ci --ignore-scripts
	- name: stylelint
	run: npx stylelint "*/.{scss,css}"
	- name: eslint
	run: npx eslint "*/.{js, ts}"
	- name: prettier
	run: npx prettier --check .

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