Suddenly stuck at "Welcome to Nginx"

Hey guys, my site has been working fine for, well, a year or two - then suddenly seemingly out of nowhere I am now stuck at “Welcome to Nginx” on my site!

The only thing that may have caused this are:

A) a sudden surge of traffic causing problems with my server B) upgrading/updating my services (apt-get update, and ee update)

Does B actually change my “core” config files!?!?

Thank you - I am stumped. I’m just a novice web admin but this is very sudden, and seemingly out of nowhere.

If you do it in that order (apt-get update before ee update) then yes, you are in risk of damaging your config files.