ci.guix.gnu.org homepage is down

[Ada Stevenson]

Hi Guix,

I just wanted to send an email out to let people know that the homepage 
of CI, ci.guix.gnu.org, is down. It returns a 504 Gateway Timeout error.

I was looking to see what was causing the build failure of 
linux-libre@6.9.6, which is when I found I couldn't access it still. I 
had tried two days ago to access it too, and it had the same error then.

Hopefully the sysadmins can look into this! Thank you for all the work 
you put into making sure things work behind the scenes :-)

Warmly,
Ada