The tl;dr for installing Screenly OSE on Raspbian Lite is:
$ bash <(curl -sL https://www.screenly.io/install-ose.sh)
(The installation will take 15-20 minutes or so depending on your connectivity and the speed of your SD card.)
To learn more about Screenly, please visit the official website at Screenly.io. On the official site, you'll find the complete installation instructions and disk images.
Quick links:
Screenly OSE works on all Raspberry Pi versions, including Raspberry Pi Zero and Raspberry Pi 3 Model B.
To simplify development of the server module of Screenly OSE, we've created a Docker container. This is intended to run on your local machine with the Screenly OSE repository mounted as a volume.
Assuming you're in the source code repository, simply run:
$ docker run --rm -ti \
-p 8080:8080 \
-v $(pwd):/home/pi/screenly \
screenly/ose-dev-server
nosetests --with-doctest