the configuration they provide is wrong on many things
1/ it says "An nginx config for your first million users",
but: worker_connections 768;
2/ html5-sse.conf:
proxy_buffering off;
bad idea for a loaded server / backend
proxy_cache off;
will enable proxy_cache, which is not defined anywhere, so this will actually fail to validate - and proxy_cache is already disabled when you're doing proxy_buffering off;
3/ https.conf:
resolver 8.8.8.8 8.8.4.4 valid=300s;
bad idea to trust anything but a local resolver, why do you trust internet to tell you IP addresses where you will go for ssl stapling info?
1/ it says "An nginx config for your first million users",
but: worker_connections 768;
2/ html5-sse.conf:
proxy_buffering off;
bad idea for a loaded server / backend
proxy_cache off;
will enable proxy_cache, which is not defined anywhere, so this will actually fail to validate - and proxy_cache is already disabled when you're doing proxy_buffering off;
3/ https.conf:
resolver 8.8.8.8 8.8.4.4 valid=300s;
bad idea to trust anything but a local resolver, why do you trust internet to tell you IP addresses where you will go for ssl stapling info?