Version mismatch: launcher vs hub.docker.com

The version installed by https://github.com/discourse/discourse_docker/blob/master/launcher#L84 is discourse/base:2.0.20190429-1058 that is different from the latest 2.0.20190512-2317 available on Docker Hub , is it right?

Yes, that is correct. The image in dockerhub is rebuilt automatically on a regular basis. The image referenced in discourse_docker is a well-tested version, which we update less frequently.

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