More docker build excitement

[JStrader-Mirion]

• The scratch/Alpine combo really brings that image size down 140MB vs 300MB or so.
• I have included the -DZLIB_INCLUDE_DIR="_deps/zlib-build" compile flags per ZLib issue #45.
• The docker containers now have two COPY commands commented out that may be uncommented to use local copies of /src and /build.
• I have adjusted the build_Container.yaml, so now it only fires manually and will begin attempting to build arm64 versions of the project. I successfully tested a single build that pushed to the ghcr container repo. Note, I haven't been able to test the matrix build, as I am presently queued. If the arm builds fail, just edit the matrix:, arch: line in the yaml file.
• It may be run directly from my repo (for the time being): docker run --rm -it -v pwd:/data -p 8078:8078 ghcr.io/jstrader-mirion/interspec:release
• Various other small changes. Feel free to cherry-pick.

[wcjohns]

This is very cool - thanks for doing all this!

I'm actually a little disappointed the build is still 140 MB. From just a quick check the resources/data should be ~55 MB, and the exe was 30 MB on my build for ARM64, so I might poke around at things when I get back from a long weekend.

[JStrader-Mirion]

In piecing this together, I have managed to break the alpine build (that commit message is misleading, as I just built the debian version twice without thinking). Hold off on actioning this PR until I rectify this. You managed to build for arm64 without issue? I believe there may be interest in running this on our MCA's, but they are only armhf. I'll have to play around with it.

[wcjohns]

Nice - thanks for all this!

Yes, it worked fine on arm64; I don't have any concerns about armhf because the Android build still compiles for, and works well, on the 32bit ARM cpus.