fix(dockerfile): Make DataHub the owner of the /tmp/datahub folder

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Unit Test Results (build & test)

63 tests  ±0   63 :heavy_check_mark: ±0   3s :stopwatch: -1s   1 suites ±0     0 :zzz: ±0    1 files   ±0     0 :x: ±0 

Results for commit 88672564. ± Comparison against base commit 63d17fdc.

:recycle: This comment has been updated with latest results.