CI for Backend and Frontend #2852

Job	Run time
backend-isort	10s
backend-flake8	11s
backend-black	10s
backend-tests	1m 30s
classic-black	15s
backend-zpretty	16s
classic-isort	9s
classic-flake8	14s
classic-zpretty	10s
frontend-eslint	48s
i18n sync	1m 10s
frontend-prettier	18s
frontend-tests	48s
release (backend, backend, Dockerfile)	5m 11s
release (frontend, frontend, Dockerfile)	5m 48s
release (classic, classic, Dockerfile)	7m 15s
	24m 23s

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