Update README.md

README.md

@@ -21,6 +21,12 @@ go build -o canvasarchiver ./cmd/canvasarchiver
    ./canvasarchiver
    ```
 
+   Or 
+   ```bash
+   ./canvasarchiver -fo
+   ```
+   For files-only mode.
+
 2. On first run, you'll be prompted to authenticate:
    - Visit the provided OAuth URL
    - Authorize the application