Same as another MPD client, make a symbolic link:
ln -s /mnt/MPD /var/www/covers
Then (Many thanks to
@[deleted] for this tip):
redis-cli hset mpdconf max_output_buffer_size "16384"
More info:
https://github.com/CDrummond/cantata
https://github.com/CDrummond/cantata/releases/
On Windows:
On Mac OS: