let's thank Chris Oliver for the fourth write-up in the Ruby Advent
Calendar 2020 / 25 Days of Ruby Gems series
presenting a new Ruby library every day from December 1st to December 25th.
For day 4 see the write-up titled
"Day 4 - noticed Gem - Send Notifications Immediately or for Later
Delivery (in the Background)
via Email, Slack, Text Message, Real-Time ActionCable in the Navbar or
Many More Channel" [1a][1b]
PS: This notification is (old-school) hand-delivered :-).