[keycloak-user] Disable SSL with keycloak-server.json

I am trying to deploy Keycloak with Docker on a headless Redhat Enterprise Linux on Amazon's EC2. There is no way to sign in on the local host. I saw a brief mention of allowing an entry in the keycloak-server.json file to disable ssl but it does not appear that was ever implemented. Is there a way to disable ssl without first needing to sign in to the master realm as administrator?