✨📝Adds a new rails example bot, close #119 (#127)

Author: crazyoptimist

CHANGELOG.md

@@ -3,6 +3,7 @@
 #### 0.12.3 (Next)
 
 * Your contribution here.
+* [#127](https://github.com/slack-ruby/slack-ruby-bot-server/pull/127): Added a Rails bot example link - [@CrazyOptimist](https://github.com/CrazyOptimist).
 
 #### 0.12.2 (2020/7/26)
 

README.md

@@ -320,6 +320,7 @@ You can see a sample implementation in [slack-sup#3a497b](https://github.com/dbl
 * [slack-api-explorer](https://github.com/slack-ruby/slack-api-explorer), see [api-explorer.playplay.io](https://shell.playplay.io)
 * [slack-strava](https://github.com/dblock/slack-strava), see [slava.playplay.io](https://slava.playplay.io)
 * [slack-arena](https://github.com/dblock/slack-arena), see [arena.playplay.io](https://arena.playplay.io)
+* [slack-rails-bot-starter](https://github.com/CrazyOptimist/slack-rails-bot-starter), an all-in-one rails starter kit built on top of the slack-ruby-bot-server and the slack-ruby-bot-server-events
 
 ### Copyright & License