Add more hacking instructions

README.md

@@ -29,7 +29,24 @@ $ pip install pelican markdown
 
 Then generate the content and run the server:
 
+### Generating the site
+
 ```bash
 $ pelican content
 $ pelican --listen
 ```
+
+Then the site is available at the following URL:
+
+> http://localhost:8000
+
+### Working on the site
+
+Run the following:
+
+```bash
+$ pelican --autoreload --listen
+```
+
+And then you can edit the files and the site will regenerate each time
+automatically. It is faster this way to review what you are working on.