create regression workflow

[ragusa]

We need a gression/build workflow.

For the build, I am thinking of 2 builds: one that uses a locally installed version of libROM (so accessed via a module load) so we can keep track of problems that are only due to changes in OpenSn) and another version that fetches the latest version of libROM so that we can catch when our App breaks due to libROM's evolution).