WIP: use much smaller MCR core variant

[octomike]

This PR is stretch.. :)

In https://github.com/octomike/matlab-compiler-runtime I build and collect MCR versions, including a much smaller, but experimental -core variant of the MCR. In my tests I was able to reduce the dockerhub reported container size from 5.07 to 1.64 GB. It's looking good so far, the code is starting/running, but there is no guarantee it does indeed cover all corner cases of cat12/spm12.

This PR bases the Dockerfile on the octomike/matlab-compiler-runtime:9.3-core image to

• reduce file size
• speed up build time a little
• simplify the Dockerfile

What do you think?

[jhuguetn]

That's interesting, will further investigate it. I agree that the image is quite heavy for what it is/does, at the moment (~8GB). Thanks @octomike

[octomike]

It's looking good so far, the code is starting/running, but there is no guarantee it does indeed cover all corner cases of cat12/spm12.

Update: With the latest changes in https://github.com/octomike/matlab-compiler-runtime/ we were able to run a regular segmentation and a longitudinal segmentation with this stripped down "core" version. Still, it's a quite hack, so further testing should be done, before this get merged.