CI for Backend and Frontend #2786

Job	Run time
backend-flake8	14s
backend-tests	2m 37s
backend-black	12s
backend-isort	10s
backend-zpretty	10s
classic-black	11s
classic-flake8	11s
classic-isort	12s
classic-zpretty	15s
frontend-eslint	50s
i18n sync	47s
frontend-prettier	16s
frontend-tests	47s
release (backend, backend, Dockerfile)	2m 57s
release (frontend, frontend, Dockerfile)	5m 19s
release (classic, classic, Dockerfile)	4m 22s
	19m 30s

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