You can use environment variables to customize config (see docker run environment options):
docker run -v lnd-data:/lnd --name=lnd-node -d \
-p 9735:9735 \
-p 10009:10009 \
lnzap/lnd
Or you can use your very own config file like that:
docker run -v lnd-data:/lnd --name=lnd-node -d \
-p 9735:9735 \
-p 10009:10009 \
-v /etc/mylnd.conf:/lnd/.lnd/lnd.conf \
lnzap/lnd