Relative URLs don't work when forking

[nicoleneo]

E.g. https://nicoleneo.github.io/cssbristol.github.io/ because / is https://nicoleneo.github.io/.

I tried https://stackoverflow.com/questions/16316311/github-pages-and-relative-paths/41127983#41127983 but ended up having to prepend site.baseurl to everything.

Surely there's a better way!