Send daily reports

[majecty]

Example content

DB is connected
Agent: test
  address: Some(V4(127.0.0.1:3485))
  status: Run
  peer count: 3
  best block number: Some(100)
  available disk: 63802 MB
  memory usage: 1760 MB / 2040 MB
Agent: test2
  address: None
  status: Stop
  peer count: 0
  best block number: None
  available disk: 63802 MB
  memory usage: 0 MB / 0 MB

[sgkim126]

Looks good, but how about changing methods of Noti takes a slice of str?
It would help to format email notification.

[majecty]

Good! Then the "
' parts would be moved to the noti module. it would be a better capsulization.

[majecty]

I tested the email, just using the "\n" works in email. Maybe the default content type was not "html".
I'll use the original code.