www-redirect (npm): Redirect 'www' to 'non-www' and 'non-www' to 'www' in NodeJs (Express). (example.com to www.example.com or www.example.com to example.com) 
Keywords: www|non-www|www redirect|www redirection express|www to non-www|non-www to www|www redirection|remove www|301 redirection|middleware|canonical|redirect|node|express|backend