This website is generated using some thicks I find interesting, for example, in the index page the tree is created using a shell command, namely tree. The funny part is that this code is actually part of the HTML file, and the command is run on the build process. For some commands I included it before the output, for fun.
The main thing here is the build.sh script that injects shell commands directly into the file, so I can use simple programs to help creating the content. Do not use it in production, it is not secure, but fine for this simple website that I have control.
I hope you find this interesting, if so take a look at the source code on my GitHub account.
Here's an example:
blmayer@computer ~$ fortune | cowsay
_____________________ < Never give an inch! > --------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || ||