Added docs to clear up PROXY definition 
Added docs to clear up PROXY definition 

The current documentation does not provide information for the difference between `:PROXY` and `::PROXY`. I have added a bit of documentation that defines the difference between the two `PROXY` fields.
kubernetes/ingress-nginx,kubernetes/ingress-nginx,canhnt/ingress,canhnt/ingress,kubernetes/ingress-nginx,aledbf/ingress-nginx,canhnt/ingress,canhnt/ingress,kubernetes/ingress-nginx,aledbf/ingress-nginx,aledbf/ingress-nginx,kubernetes/ingress-nginx,aledbf/ingress-nginx