doc: 修改文档

README.md

@@ -9,3 +9,7 @@ goctl model mysql ddl -c -src model/user.sql -dir model
 
 ### RUN API GATEWAY
 go run i2bill.go -f etc/i2bill-api.yaml
+
+
+### TEST
+https://api-test-bill.i2edu.net/api/users/id/1