Merge branch 'nginx-resolver' into 'master'

nginx: Set a resolver

Closes #607

See merge request !848

roles/nginx/templates/sslsettings.conf

@@ -18,3 +18,5 @@ map $scheme $hsts_header {
 }
 
 add_header Strict-Transport-Security $hsts_header always;
+
+resolver 127.0.0.53;