Cors and Kind port mismatched with front end vue

[rayguo17]

while vue front end fetching from "http://localhost" which is port 80, the actual port mapping in the kind-config.yaml is mapping container's port 80 to real world port 40080.
What's more, due to chrome's auto cors problem, we should add configuration for cors both in frontend vue and backend go.

[rayguo17]

Should be solved in #3