CI for Backend and Frontend #3379

Job	Run time
backend-black	14s
backend-isort	16s
backend-tests	2m 10s
backend-flake8	17s
backend-zpretty	16s
classic-flake8	16s
classic-isort	10s
classic-black	14s
classic-zpretty	13s
frontend-eslint	1m 12s
i18n sync	52s
frontend-prettier	8s
frontend-tests	1m 9s
release (backend, backend, Dockerfile)	5m 7s
release (frontend, frontend, Dockerfile)	5m 30s
release (classic, classic, Dockerfile)	6m 30s
	24m 34s

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