add cron example to test/README.md

test/README.md

@@ -18,3 +18,12 @@ Or run a specific test function in a specific class in a specific file
 ```python
 python3 -m unittest test.test_title.TestTitle.test_title_anchor
 ```
+
+cron example everyday at 6am
+```bash
+#!/bin/bash
+PATH=/usr/local/bin:/usr/bin:/bin
+0 4 * * * cd <project directory> && <rsync the db file>
+0 5 * * * cd <project directory> && <rsync the html output directory>
+0 6 * * * cd <project directory> && bash -c 'echo "$((python3 -m unittest)2>&1)"' | sendxmpp <sendxmpp params>
+```