Switch ImageLayers badges to MicroBadger badges

ImageLayers seems not support Docker Registry v2 API.

See [1], [2], [3], [4], [5], [6] for details.

[1]: https://medium.com/microscaling-systems/be-docker-image-conscious-deef8008fdce
[2]: microscaling/imagelayers-graph#85 (comment)
[3]: CenturyLinkLabs/docker-reg-client#5
[4]: microscaling/imagelayers-graph#94
[5]: microscaling/imagelayers-graph#96
[6]: microscaling/imagelayers-graph#92

README.md

@@ -3,7 +3,8 @@ Docker alpine-scripts
 
 [![Docker Stars](https://img.shields.io/docker/stars/dochang/alpine-scripts.svg)](https://hub.docker.com/r/dochang/alpine-scripts/)
 [![Docker Pulls](https://img.shields.io/docker/pulls/dochang/alpine-scripts.svg)](https://hub.docker.com/r/dochang/alpine-scripts/)
-[![](https://badge.imagelayers.io/dochang/alpine-scripts:latest.svg)](https://imagelayers.io/?images=dochang/alpine-scripts:latest 'Get your own badge on imagelayers.io')
+[![](https://images.microbadger.com/badges/image/dochang/alpine-scripts:latest.svg)](http://microbadger.com/images/dochang/alpine-scripts:latest "Get your own image badge on microbadger.com")
+[![](https://images.microbadger.com/badges/version/dochang/alpine-scripts:latest.svg)](http://microbadger.com/images/dochang/alpine-scripts:latest "Get your own version badge on microbadger.com")
 
 This is a basic docker image that contains some helper scripts for building
 alpine based docker images.