* Run node 10 with '--experimental_worker' flags
* Use dedicated function to retrieve node/npm program version
The goal of this commit is to ensure that any linux based node 10 deployments run with the experimental_worker flag. This flag is required for workers to "work" in node 10. This will not affect other versions of node. This resolves#4335 where Docker would fail due to being based on node 10.
jeanfabrice