Merge pull request #62 from ankitgyawali/patch-1

Update SETUP.md

Author: iFargle

SETUP.md

@@ -9,7 +9,7 @@
 # Contents
   * [Docker Compose](#docker-compose)
   * [Reverse Proxies](#reverse-proxies)
-  * [Autnentication](#authentication)
+  * [Authentication](#authentication)
 
 ---
 # Docker Compose