Verify the apache webserver is writable and running
Make a file in the DOMS directory:
echo "Hello world" > /var/www/html/DOMS/test.txt
Retrieve http://localhost/DOMS/test.txt
wget -q -O - http://localhost/DOMS/test.txt
It should show "Hello world".
Clean up after you.
rm /var/www/html/DOMS/test.txt