fix: DB - Add mount to place test databases in unique folder #91
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@kylecarbs and I were observing some flakes when running the tests backed by postgres. We noticed that the postgres image sets up a volume: https://github.com/docker-library/postgres/blob/a83005b407ee6d810413500d8a041c957fb10cf0/11/alpine/Dockerfile#L155 and will use that location on the host as the default.
This change generates a random tempdir for the test and mounts that folder to the tempdir - hopefully avoiding collisions between parallel test runs.