Use webpack for bundling JS libs and move Golang code related to Iframe generation there

types/endpoints.go

-package types
-
-import "net/http"
-
-// TODO: this type rather belongs to restful-api, but we have to declare it there and use in restful-api as dependency. Move to separate repository in the future.
-type EndPoint struct {
-	Url             string
-	Prefixes        []string
-	HandlerType     string
-	Form            interface{}
-	ManuallyWritten bool
-	Handler         func(http.ResponseWriter, *http.Request)
-	DoNotIntercept  bool
-}