SOLVED site’s url is not set by default
On GitHub Pages (the ‘real one’), if one forgets to set the
urlvariable in jekyll’s configuration file, apparently it will automagically be set correctly.
Using Cloudron’s GitHub Pages app, the
urlseems to remain empty. Or, at least, the
absolute_urlfilter in jekyll does nothing. (and setting the
_config.ymlfixed this for us)
@gerben thanks, I have tried to fix it in the latest release.