README.md

@@ -2,3 +2,17 @@
 [![Build Status](https://drone.fedy95.com/api/badges/infra/docker_registry/status.svg)](https://drone.fedy95.com/infra/docker_registry)
 
 - [docker-hub](https://hub.docker.com/_/registry)
+
+### How to use
+```shell script
+docker login registry.fedy95.com -u{USER} -p{PASSWORD}
+
+docker pull ubuntu:latest
+docker tag ubuntu:latest registry.fedy95.com/image-name
+docker push registry.fedy95.com/image-name
+docker pull registry.fedy95.com/image-name
+
+docker logout registry.fedy95.com
+```
+
+- [registry API](https://docs.docker.com/registry/spec/api)