That is your weep tube from the chamber between the water pump seal and the engine oil seal. When either starts to leak, it's supposed to exit the hole on the bottom of the chamber...but...with the tube, it can't without filling that tube up completely first. You need to get that hose to lay down so it drains and keeps that chamber drained. What you are seeing is the green coolant that is leaking past the mechanical seal. Most all CFMs do this at the start but most quit if a couple hundred miles. If it does not stop, or has started after having a few hundred miles on it, your dealer has a fix for it as some had mechanical seals were defective and just never sealed. Keep the recovery bottle full for now. Mine did it too but quit before I hit 200 miles. Also my 2015 didn't have that tube on it...it just has an open hole on the bottom.