Improved docker-compose.yaml

[rselph]

This docker-compose file offers a few advantages:

• Doesn't use host network. This is a security improvement, and means that neither the redis port nor the zmq port need to be made public.
• Persists redis data. This also prevents the redis container from creating an anonymous volume each time it is created.
• Persists ntopng data
• Sets timezone for ntopng
• Expands local network definition
• Enables DNS lookups