CI for Backend and Frontend #2920

Job	Run time
backend-flake8	11s
backend-black	13s
backend-isort	10s
backend-tests	1m 45s
classic-black	9s
classic-flake8	10s
classic-isort	11s
backend-zpretty	9s
classic-zpretty	15s
frontend-eslint	1m 17s
i18n sync	1m 0s
frontend-prettier	10s
frontend-tests	56s
release (backend, backend, Dockerfile)	4m 44s
release (frontend, frontend, Dockerfile)	6m 18s
release (classic, classic, Dockerfile)	7m 6s
	24m 44s

Provide feedback