Fix path during initial backup
During make
cp: cannot stat '/tmp/nginx_backup_2018-07-25/sites-available': No such file or directory
cp: cannot stat '/tmp/nginx_backup_2018-07-25/sites-enabled': No such file or directory
During make
cp: cannot stat '/tmp/nginx_backup_2018-07-25/sites-available': No such file or directory
cp: cannot stat '/tmp/nginx_backup_2018-07-25/sites-enabled': No such file or directory