Merge pull request #23 from OpenRL-Lab/dev

update docs

Author: huangshiyu13

docs/index.rst

@@ -38,12 +38,12 @@ An example for using QRcode_plugin
   * Go to the directory of QRcode_plugin: ``cd plugins/QRcode_plugin``
   * Install QRcode_plugin: ``op install ./``
 
+* Start QRcode_plugin: ``op run QRcode_plugin -p server_port``
 * Or you can start QRcode_plugin from local:
 
   * Go to the directory of QRcode_plugin: ``cd plugins/QRcode_plugin``
   * Start QRcode_plugin: ``op run ./ -p server_port``
 
-* Start QRcode_plugin: ``op run QRcode_plugin -p server_port``
 * Then you can get the `ai-plugin.json`` file via visiting ``http://<server_ip>:server_port/ai-plugin.json``
 * You can get the ``openaip.yaml`` file via visiting ``http://<server_ip>:server_port/openaip.yaml``