CI for Backend and Frontend #5162

Job	Run time
backend-tests	1m 17s
backend-black	13s
backend-isort	9s
backend-flake8	10s
backend-zpretty	9s
classic-flake8	10s
classic-black	9s
classic-isort	9s
classic-zpretty	22s
frontend-eslint	44s
frontend-prettier	6s
i18n sync	43s
frontend-tests	42s
release (backend, backend, Dockerfile)	1m 50s
release (frontend, frontend, Dockerfile)	5m 17s
release (classic, classic, Dockerfile)	1m 57s
	14m 7s

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