location /roundcube/ {
        alias /usr/share/roundcubemail/;
        index index.php;
        error_page 404 @apache;
}
location ~ ^/roundcube/(.+\.php)$ {
        alias /usr/share/roundcubemail/$1;
        fastcgi_pass unix:/var/run/php-fpm.apache.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $request_filename;
        fastcgi_param PHP_FLAG "display_errors=on \n display_startup_errors=on";
        fastcgi_param PHP_VALUE "error_reporting=-1";
        include fastcgi_params;
        error_page 502 = @apache;
        error_page 404 = @apache;
}
location @apache {
        error_log /dev/null crit;
        proxy_pass http://127.0.0.1:8080;
        proxy_redirect http://127.0.0.1:8080 /;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
}