Update Dockerfile

1 job from test in 8 minutes and 21 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #33
build

00:08:21

 
Name Stage Failure
failed
build Build
The CancellationTokenSource has been disposed.
Application is shutting down...
The CancellationTokenSource has been disposed.

Total tests: 116. Passed: 27. Failed: 89. Skipped: 0.
Test execution time: 2.4079 Minutes
Test Run Failed.
The command '/bin/sh -c dotnet test DeStream.Stratis.Bitcoin.FullNode.sln' returned a non-zero code: 1
ERROR: Job failed: exit code 1