Hello,
Was a solution ever found for this problem? I am interested in deploying keycloak on render.com as well.
Could the problem be related to the disk/memory requirements of running the container? Found this thread, but it is slightly outdated. But if true, the free tier won’t work :/.
Also, is your instance of postgres running at the time of deployment? if not, would putting the database before the keycloak webservice in render.yaml, similarly to how it is done in some of the quickstart guides. Also, if you are using the native postgres on render, the connection string is for internal connections is formatted differently than in your latest version of the Dockerfile, as per the render docs.
Maybe one of these will work?