Rendering in Linux is different than Windows when it comes to pixel alignment (#340) and fonts (#1649, #1310, #1079) and it is helpful to have an easy way to inspect images rendered using Linux.

ScottPlot tests work on my machine in Linux using WSL, but it seems more useful to run these tests in a Docker container

I am able to build the project in docker, but the NUnit3 tests fail to run:

System.IO.FileNotFoundException: 
  Could not load file or assembly 'Microsoft.Bcl.AsyncInterfaces, Culture=neutral, PublicKeyToken=null'. 
  The system cannot find the file specified.