Zn Static File Server

As part of a live demo of Zinc HTTP Components,
this is a static file server, serving the contents of a local directory,
/home/stfx/zn under the prefix /zn

• An example HTML file /zn/small.html
• An example text file /zn/numbers.txt
• Live cloud instance https://zn.stfx.eu
• Old index page /zn/old-index.html