Update README.md

README.md

@@ -5,14 +5,14 @@
 </p>
 
 
-crowi-plus [![Chat on Slack](https://crowi-plus-slackin.weseek.co.jp/badge.svg)](https://crowi-plus-slackin.weseek.co.jp/)
+crowi-plus [![Chat on Slack](https://crowi-plus-slackin.weseek.co.jp/badge.svg)](slackin)
 ===========
 
 [![wercker status](https://app.wercker.com/status/39cdc49d067d65c39cb35d52ceae6dc1/s/master "wercker status")](https://app.wercker.com/project/byKey/39cdc49d067d65c39cb35d52ceae6dc1)
 [![dependencies status](https://david-dm.org/weseek/crowi-plus.svg)](https://david-dm.org/weseek/crowi-plus)
 [![MIT License](http://img.shields.io/badge/license-MIT-blue.svg?style=flat)](LICENSE)
 
-This is **crowi-plus** that is the fork of [Crowi](https://github.com/crowi/crowi), is [perfectly compatible with official](https://github.com/weseek/crowi-plus/wiki/Questions-and-Answers#does-crowi-plus-have-compatibility-with-official-crowi), and has been enhanced with the following points:
+This is **crowi-plus** that is the fork of [Crowi](crowi), is [perfectly compatible with official](https://github.com/weseek/crowi-plus/wiki/Questions-and-Answers#does-crowi-plus-have-compatibility-with-official-crowi), and has been enhanced with the following points:
 
 * Pluggable
   * Find plugins from [npm](https://www.npmjs.com/browse/keyword/crowi-plugin) or [github](https://github.com/search?q=topic%3Acrowi-plugin)!
@@ -22,8 +22,8 @@ This is **crowi-plus** that is the fork of [Crowi](https://github.com/crowi/crow
 * Secure
   * Upgrade jQuery to 3.x
   * Upgrade other insecure libs
-* [Docker Ready](https://hub.docker.com/r/weseek/crowi-plus/)
-* [Docker Compose Ready](https://github.com/weseek/crowi-plus-docker-compose)
+* [Docker Ready](dockerhub)
+* [Docker Compose Ready](docker-compose)
 * [Added miscellaneous features](https://github.com/weseek/crowi-plus/wiki/Additional-Features)
 * Developer-friendly
   * Less compile time
@@ -48,7 +48,7 @@ cd crowi-plus
 docker-compose up
 ```
 
-see also [weseek/crowi-plus-docker-compose](https://github.com/weseek/crowi-plus-docker-compose)
+see also [weseek/crowi-plus-docker-compose](docker-compose)
 
 On-premise
 ----------
@@ -161,13 +161,13 @@ Found a Bug?
 -------------
 
 If you find a bug in the source code, you can help us by
-[submitting an issue](https://github.com/weseek/crowi-plus/issues) to our [GitHub Repository][github]. Even better, you can
-[submit a Pull Request](https://github.com/weseek/crowi-plus/pulls) with a fix.
+[submitting an issue](issues) to our [GitHub Repository][crowi-plus]. Even better, you can
+[submit a Pull Request](pulls) with a fix.
 
 Missing a Feature?
 -------------------
 
-You can *request* a new feature by [submitting an issue](https://github.com/weseek/crowi-plus/issues) to our GitHub
+You can *request* a new feature by [submitting an issue](issues) to our GitHub
 Repository. If you would like to *implement* a new feature, please submit an issue with
 a proposal for your work first, to be sure that we can use it.
 Please consider what kind of change it is:
@@ -175,7 +175,7 @@ Please consider what kind of change it is:
 * For a **Major Feature**, first open an issue and outline your proposal so that it can be
 discussed. This will also allow us to better coordinate our efforts, prevent duplication of work,
 and help you to craft the change so that it is successfully accepted into the project.
-* **Small Features** can be crafted and directly [submitted as a Pull Request](https://github.com/weseek/crowi-plus/pulls).
+* **Small Features** can be crafted and directly [submitted as a Pull Request](pulls).
 
 Language
 ---------
@@ -185,10 +185,19 @@ Write issues and PRs in Engulish or Japanese.
 Discussion
 -----------
 
-If you have something to ask or want to discuss, please [join to our Slack team](https://crowi-plus-slackin.weseek.co.jp/). Talk about anything and anytime.
+If you have something to ask or want to discuss, please [join to our Slack team](slackin). Talk about anything and anytime.
 
 License
 =======
 
 * The MIT License (MIT)
 * See LICENSE file.
+
+
+[crowi]: https://github.com/crowi/crowi
+[crowi-plus]: https://github.com/weseek/crowi-plus
+[issues]: https://github.com/weseek/crowi-plus/issues
+[pulls]: https://github.com/weseek/crowi-plus/pulls
+[dockerhub]: https://hub.docker.com/r/weseek/crowi-plus
+[docker-compose]: https://github.com/weseek/crowi-plus-docker-compose
+[slackin]: https://crowi-plus-slackin.weseek.co.jp/