PHRAS-4010 uniformise db container's deployments #818

Job	Run time
build phraseanet-elasticsearch / build	39s
build phraseanet-db / build	37s
build phraseanet-fpm / build	4m 1s
build phraseanet-nginx / build	2m 46s
build phraseanet-setup / build	3m 37s
build phraseanet-worker / build	3m 33s
unit test	2m 12s
	17m 25s

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