Publish workflow got broken about website

[tierra]

That's really weird. We do already lock all NPM packages in yarn.lock. I'll check this out later tonight.

[vadz]

Switching to 20.04 didn't help, but looking closer at the log, it's calling the compiler with -std=gnu++14 -std=c++0x options, i.e. it explicitly disables the use of C++14 with the latter choice of C++11. Unfortunately I have no idea where does this c++0x come from nor how to get rid of it...

[vadz]

I've fixed this by upgrading to node-sass 6.0.1 as I couldn't find a way to use a previous Node version and only node-sass 6 supports Node 16.

This did fix the build, I just hope this didn't break any functionality. The web site looks fine at first glance, but I have no idea what could have changed in node-sass since the v4 that we previously used. But I've also seen that it has been deprecated now, so hopefully they didn't change it in a backwards incompatible way before deprecating it. Hopefully...