Create Github action testing backend #3

	name: Backend

	on: [push, pull_request]

	jobs:
	test-lint-and-format:
	name: Backend test, lint and format
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.11
	uses: actions/setup-python@v3
	with:
	python-version: 3.11
	- name: Install dependencies
	run: \|
	cd backend
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: End-to-end test
	run: \|
	set -x
	cd backend
	CORS_ORIGINS='' MEDIA=.. flask --app src/app.py run &
	while [[ -z "${DIR_LIST:-}" ]]; do DIR_LIST=$(curl 'http://127.0.0.1:5000/?dir=' \|\| true); done

	echo "$DIR_LIST" \| grep '{"name":".gitignore","type":"file","url":"/.gitignore"}'
	echo "$DIR_LIST" \| grep '{"name":"backend","type":"directory","url":"/backend"}'
	- name: Lint
	run: \|
	pylint $(git ls-files '*.py')
	- name: Format
	run: \|
	black . --check

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