I was trying to change the site generator to something simpler and that would also support including images hosted elsewhere.
The change was simple.
Post headers are similar. Before:
title: My progress in setting this site up
title= "My progress in setting this site up"
Not so complicated.
However, in then end, I looked at the source code and found some ugliness:
<meta name="generator" content="Hugo 0.18.1" />
<link rel="canonical" href="https://xn--tp-rja.eu/">
<link href="https://tp%C3%AE.eu/index.xml" rel="alternate" type="application/rss+xml" title="Thomas Piart" />
After some digging in the options, it found two options:
canonifyURLs = true
relativeURLs = true
they made some url relative, but some were still broken and here did not seem to be an easy way to solve that.
I raised some issues on github, but eventually choose not to use Hugo.