The previous website was made with Drupal. The website was not used a lot and contained not very much information, so Drupal was a lot of overkill. Also Drupal had some security issues in the past which had to be patched very urgent. This new website is made with Hugo. Hugo is a simple and very small framework for building static websites. Now there is no more need of PHP and a database to serve this website. Hugo makes use of text files in Markdown format. After entering all content a simple command generates this static website. The content is under version control with Git, so it is always possible to revert and track changes. There are a lot of nice Hugo themes to make websites look nice.
How to use Hugo
I used several tutorials building this website, namely: