Do not clean up GitHub Action workers if no Docker build is needed #534

	name: Run Flake8

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Install dependencies
	run: pip install -r requirements.txt
	- name: Run tests
	run: flake8

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