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Apparently upstream stopped updating docker hub images semi recently. We should pull from the quay.io location instead. As far as I can tell docker.io/jboss/keycloak and quay.io/keycloak/keycloak orginate from https://github.com/keycloak/keycloak-containers so this switch is in theory fine. But I guess we'll find out. Change-Id: I42c4a62468a5960332126fec90fcf6307c5b6674
Run a Keycloak server.