mongo     | 2018-11-21T13:18:31.002+0000 I FTDC     [ftdc] Unclean full-time diagnostic data capture shutdown detected, found interim file, some metrics may have been lost. OK
prisma    | Exception in thread "main" java.lang.RuntimeException: Unable to load Prisma config: java.lang.RuntimeException: Please provide a valid Mongo connection uri.

Hmmm. How can I see what connection string prisma is using? The docker-compose.yml seems correct to me .

I think you should ask that in #preview-mongo