CI for Backend and Frontend #4088

Job	Run time
backend-isort	9s
backend-tests	1m 26s
backend-flake8	8s
backend-black	13s
backend-zpretty	12s
classic-black	8s
classic-flake8	8s
classic-isort	12s
classic-zpretty	12s
frontend-eslint	44s
i18n sync	42s
frontend-prettier	6s
frontend-tests	49s
release (backend, backend, Dockerfile)	1m 14s
release (frontend, frontend, Dockerfile)	4m 23s
release (classic, classic, Dockerfile)	1m 12s
	11m 58s

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