build: restructure / simplify frontend docker volumes #1343

Job	Run time
backend-test / check-img-cache	15s
frontend-unit-test / Run Frontend Tests	23s
frontend-e2e-test / check-img-cache	0s
frontend-e2e-test / test-img-build	0s
frontend-e2e-test / run-tests	5m 6s
backend-test / test-img-build	0s
backend-test / run-tests	3m 54s
backend-build / build-image	2m 15s
frontend-build / build-image	1m 36s
backend-build / scan-image	47s
frontend-build / scan-image	28s
smoke-test-frontend	54s
smoke-test-backend	1m 14s
deploy-containers / remote-deploy	1m 22s
	18m 14s

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