Since a lot of people recommended docuwiki for setting up a quick and easy way to document stuff I wanted to give it a try!
As I own a recent QNAP home storage (which supports vhosts, php, … and all other required things) why not combine them
First, enable the webserver (Network Services -> Web Server) and then switch on vhost support.
Create a new vhost for your new docuwiki installation with port 80 and /Web/docuwiki as path.
Since the folder “docuwiki” is not created automatically, log into your QNAP with SSH and create the folder.
Find your way to the docuwiki website (https://www.dokuwiki.org/) and download the most recent version as tar.gz. You might want to use wget to download it directly onto you QNAP.
wget http://www.splitbrain.org/_media/projects/dokuwiki/dokuwiki-2012-10-13.tgz -O /share/Web/docuwiki/dokuwiki-2012-10-13.tgz
Extract the tgz file into /Web/docuwiki and point your browser to http://
The build-in installer should come up and ask you some simple things.
If docuwiki is not happy with some of your folder permissions, add write permission to the listed folders with chmod