Update README.md

services/git-bridge/README.md

@@ -36,6 +36,11 @@ The configuration file is in `.json` format. There is an example at `bin/config.
         "password" (string, optional): password for http basic auth,
         "postbackBaseUrl" (string): the postback url,
         "serviceName" (string): current name of writeLaTeX in case it ever changes
+        "oauth2" (object): { /* null or missing if oauth2 shouldn't be used */
+            "oauth2ClientID" (string): oauth2 client ID
+            "oauth2ClientSecret" (string): oauth2 client secret
+            "oauth2Server" (string): oauth2 server, with protocol and without trailing slash
+        }
     }
 
 You have to restart the server for configuration changes to take effect.