Merge pull request #1065 from hskang9/patch-1

docs/tutorial_remixd_filesystem.md

@@ -10,9 +10,12 @@ The code of RemixD can be checked out
 Remixd can be globally installed using the following command:
 `npm install -g remixd`.
 
-Then `remixd -s <absolute-path-to-the-shared-folder>` will start Remixd
+Then `remixd -s <absolute-path-to-the-shared-folder> --remix-ide <your-remix-ide-URL-instance>` will start Remixd
 and share the given folder. 
 
+For example, to sync your local folder to the official Remix IDE, 
+`remixd -s <absolute-path-to-the-shared-folder> --remix-ide https://remix.ethereum.org`
+
 The folder is shared using a websocket connection between `Remix IDE`
 and `Remixd`.