build(webpack): set the publicPath to an empty string

[bnmajor]

Automatic publicPath is not always supported.

[PaulHax]

A step in the right direction!

Regarding the test 404: Looks like the default, publicPath: 'auto' resolves to an absolute path which helps out pipeline.worker.js

[bnmajor]

@PaulHax Thanks! If you have some insight here I'd love it since my experience with Webpack is limited and I'm basically going through a lot of Google and guess and check at this point...

I need to add itk-vtk-viewer as a dependency for tensorboard-plugin-3d, but when I do I get an error: Automatic publicPath is not supported in this browser. Local testing shows that setting the publicPath to an empty string (generally the first suggestion I am seeing when digging around) does work for me in the plugin, but this is creating test failures (as you can see).

Running the tests myself I see that it fails in imjoyTest.js trying to call setImage with a URL. When the publicPath is not set to auto it returns a 404 trying to fetch NrrdImageIOReadImage.wasm. It should be using the path /base/dist/itk/image-io/NrrdImageIOReadImage.wasm but instead it is looking for /base/dist/itk/web-workers/min-bundles/itk/image-io/NrrdImageIOReadImage.wasm.

[PaulHax]

I'm been flaying at this same thing too =(

Not sure this is the proper approach but lifting pipeline.worker.js up passes the tests =)

https://github.com/Kitware/itk-vtk-viewer/compare/master...PaulHax:public-path-hax?expand=1

[bnmajor]

This PR is outdated and not needed, closing.