add -w option and timeout config

README.md

@@ -61,6 +61,7 @@ Command:
 
 Option:
     -c    Specify a config file
+    -w    Check the interval of the configuration file
 ```
 
 ## Config
@@ -73,10 +74,12 @@ You can update the config file at any time, updns will listen for file changes
 ```ini
 bind     0.0.0.0:53    # Binding address
 proxy    8.8.8.8:53    # Proxy address
+timeout  2000          # Proxy timeout (ms)
 
 # Domain matching
 google.com             1.1.1.1
-^(\w+.)?go+gle.com$    2.2.2.2
+^\w+.bing.com$         2.2.2.2
+github.com             ::
 
 # Import from other file
 import /other/hosts