fix: dockerfile warning such as Casing and whitespace separator (#1815) #1310

Job	Run time
frontend-unit-test / Run Frontend Tests	22s
backend-test / check-img-cache	5s
frontend-e2e-test / check-img-cache	0s
frontend-e2e-test / test-img-build	0s
frontend-e2e-test / run-tests	3m 57s
backend-test / test-img-build / build-image	2m 55s
backend-test / test-img-build / scan-image	0s
backend-test / run-tests	4m 2s
frontend-build / build-image	31s
frontend-build / scan-image	0s
smoke-test-frontend	0s
backend-build / build-image	2m 20s
backend-build / scan-image	46s
smoke-test-backend	1m 7s
deploy-containers	0s
	16m 5s

Provide feedback