CI for Backend and Frontend #3441

Job	Run time
backend-black	10s
backend-isort	10s
backend-flake8	17s
backend-zpretty	10s
classic-black	15s
classic-flake8	15s
backend-tests	2m 0s
classic-isort	12s
classic-zpretty	9s
frontend-eslint	1m 19s
i18n sync	54s
frontend-prettier	11s
frontend-tests	1m 1s
release (backend, backend, Dockerfile)	5m 15s
release (frontend, frontend, Dockerfile)	9m 8s
release (classic, classic, Dockerfile)	5m 18s
	26m 44s

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