Runtimelibs

Runtime libs for SpectraRead, based on ubuntu docker image.

make x86_64 pulls the container from dockerhub and install all the dependencies. User namespaces must be enabled for the build process, but not for running spectraread.

Docker is not needed for this to work, the container is downloaded using the shell script in /util/download-frozen-image-v2.sh and run using user namespaces, see nstest.c.