Update readme.md #282

	# Github Actions CI/CD
	---
	name: Checks # Workflow 이름

	on: [push] # git push 이벤트 활성화 -> 레포지토리에 push를 했을 떄 활성화

	jobs:
	test-lint:
	name: Test and Lint
	runs-on: ubuntu-20.04 # 작업 환경
	steps: # 작업 단계
	- name: Login in to Docker Hub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USER }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	- name: Check Out - pull repository code # GitHub에 있는 코드를 작업 환경으로
	uses: actions/checkout@v2
	- name: Run Test-Code
	run: docker-compose run --rm app sh -c 'python manage.py wait_for_db && python manage.py test'

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