Update README.md

README.md

@@ -5,6 +5,12 @@ Web pages for the QIM 3D data repository. The data is placed elsewhere.
 Pages are made using [templates](https://www.w3schools.com/w3css/w3css_templates.asp) from w3schools, in particular the 
 [portfolio](https://www.w3schools.com/w3css/tryw3css_templates_portfolio.htm) template.
 
+When viewing pages on your machine, your internet browser will probably prevent loading JavaScript code which inserts sidebar, header and footer. 
+Instead of changing your security policy, you can run a local server, e.g. Python’s built-in http server.
+1. From the command line, run `python -m http.server` (this is for Python 3.x).
+1. In a browser, open [http://localhost:8000/](http://localhost:8000/) and navigate to your file.
+
+
 Some of the files are:
 * `w3_nature_portfolio_template.html` - This is the original template, placed here for just for reference, so you will probably not need it. 
 * `qim_repository_template_all.html` - This is the original w3 template with modified sidebar, header and footer. Also colors. This can be used when making changes to sidebar, header and footer. Can also be used for checking other possibilities given by the template. But probably not updated, so be careful when using.