Adjust nodejs install method

We are using the nodejs setup_X script to install it, but the recommended method is now to use the package manager.

#16 0.335                            SCRIPT DEPRECATION WARNING                    
#16 0.335 
#16 0.335   
#16 0.335   This script, located at https://deb.nodesource.com/setup_X, used to
#16 0.335   install Node.js is deprecated now and will eventually be made inactive.