This is the great source for Magento news and tutorials. I mostly keep reading Magneto tutorials to get daily updates and news regarding magento. I like this source but the tutorials on Magneto and Magenticians is entirely different and easy to learn.
We're introducing pipeline deployment in our upcoming release (2.2) which with our improvements to Varnish caching (saint & grace mode) you should be able to get a minimal downtime deployment with fairly minimal CICD work.