Recommended and mentioned products
Screenly is the world's most popular digital signage solution for the Raspberry Pi.
freemium $29.95 / Monthly
You can use screenly.io Pro version, or for 10 or less devices, check out balena.io.
Balena is a container-based platform to develop, deploy, and manage code running on remote devices - quickly, safely, and at scale.
Basically, it is just installing balena.io base OS image, which does the management of the hardware. Then you install screenly as a docker image.