Update README.md

2016-12-31 07:06:38 +09:00 · 2016-12-31 07:06:38 +09:00 · 44949cd0c7
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@ -21,12 +21,15 @@ A miniblog-based SNS.
 `npm test`

 ## Setup
-### Dependencies
+### Dependencies :package:
 Please install these softwares.
 * **[MongoDB](https://www.mongodb.com/)**
 * **[Redis](https://redis.io/)**
 * **[GraphicsMagick](http://www.graphicsmagick.org/)**
-* [Elasticsearch](https://www.elastic.co/) (optional)
+
+#### Optional
+* [Elasticsearch](https://www.elastic.co/)
+  * If omit it, Misskey use the *MongoDB* for search instead. If not, Misskey will can better search.

 ### Domains
 Misskey requires two domains called the primary domain and the secondary domain.