If you would be a long term user i would use swear words - but as you are a newbie i only like to give an important advise:
Please consider that *:80 is fucking bullshit and you really don't want nginx listen to all local ipadresses:80 and the random:80 - thank you in advance
- it's btw the same bullshit as in apache and possible lighty - whoever think that *:80 is a good default should never be allowed to write a default configuration again
nginx/sites-available/default: listen 80 default_server;
nginx/sites-available/default: listen [::]:80 default_server;
nginx/sites-available/default:# listen 80;
nginx/sites-available/default:# listen [::]:80;
and of course
$ ls /etc/nginx/sites-enabled/ -lia
insgesamt 8
2900008 drwxr-xr-x 2 root root 4096 Nov 8 02:54 .
2897154 drwxr-xr-x 6 root root 4096 Nov 8 02:54 ..
2895811 lrwxrwxrwx 1 root root 34 Nov 8 02:54 default -> /etc/nginx/sites-available/default
really nice, isn't it - i would suggest to bind default to 127.0.0.1:80 and [::1]:80 - solved and btw - pywwetha is bound to 127.0.0.86 ff i guess - so it should not disturb any normal configured webserver