Updated Settings (markdown)

Settings.md

@@ -18,6 +18,7 @@
     - [UseLocalAvatar](#uselocalavatar)
 - [General](#general)
     - [IgnoreFailureOnStart](#ignorefailureonstart)
+    - [LogFile](#logfile)
     - [MediaDownloadBlacklist](#mediadownloadblacklist)
     - [MediaDownloadPath](#mediadownloadpath)
     - [MediaDownloadSize](#mediadownloadsize)
@@ -323,6 +324,17 @@ Example: enable it
 
 `IgnoreFailureOnStart=true`
 
+## LogFile
+
+LogFile defines the location of a file to write logs into, rather than stdout.
+Logging will still happen on stdout if the file cannot be open for #writing, or if the value is empty. 
+Note that the log won't roll, so you might want to use logrotate(8) with this feature.
+
+Setting: OPTIONAL, GENERAL \
+Format: string \
+Example:
+
+`LogFile="/var/log/matterbridge.log"`
 
 ## MediaDownloadBlacklist 
 Allows you to blacklist specific files from being downloaded.