api/app.go
func appInfo(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	a, err := getAppFromContext(r.URL.Query().Get(":app"), r)
	if err != nil {
		return err
	}
	canRead := permission.Check(t, permission.PermAppRead,
		contextsForApp(&a)...,
	)
	if !canRead {
		return permission.ErrUnauthorized
	}

	err = a.FillInternalAddresses(r.Context())
	if err != nil {
		return err
	}

	w.Header().Set("Content-Type", "application/json")
	return json.NewEncoder(w).Encode(&a)
}
func appInfo(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	a, err := getAppFromContext(r.URL.Query().Get(":app"), r)
	if err != nil {
		return err
	}
	canRead := permission.Check(t, permission.PermAppRead,
		contextsForApp(&a)...,
	)
	if !canRead {
		return permission.ErrUnauthorized
	}

	err = a.FillInternalAddresses(r.Context())
	if err != nil {
		return err
	}

	w.Header().Set("Content-Type", "application/json")
	return json.NewEncoder(w).Encode(&a)
}
// title: app info
// path: /apps/{name}
// method: GET
// produce: application/json
// responses:
//   200: OK
//   401: Unauthorized
//   404: Not found