update readme for kong frontend
update readme for kong frontend

Skyscanner/kong,AnsonSmith/kong,chourobin/kong,bbalu/kong,ropik/kong,skynet/kong,sbuettner/kong,wakermahmud/kong,puug/kong,vmercierfr/kong,peterayeni/kong,paritoshmmmec/kong,ChristopherBiscardi/kong