Expand README

Author: ammario

README.md

@@ -18,3 +18,19 @@ go get go.coder.com/sshcode
 sshcode [email protected]
 # Starts code-server on dev.kwc.io and opens in a new browser window.
 ```
+
+You can specify a remote directory as the second argument:
+
+```bash
+sshcode [email protected] ~/projects/sourcegraph
+```
+
+## Extensions & Settings Sync
+
+By default, `sshcode` will `rsync` your local VS Code settings and extensions
+to the remote server every time you connect.
+
+This operation may take a while on a slow connections, but will be fast
+on follow-on connections to the same server.
+
+To disable this feature entirely, pass the `--skipsync` flag.