Docker install help

I'm having issues getting a raspberry pi zero w configured to use docker. I am starting with a clean image (1.4G) of stretch lite on a 8GB sd card. I've tried to run both the Build and Pull methods for installing and although I start with 5.6G before the install I keep getting device is out of space errors. I don't know enough about docker to diagnose anything. Any help on what I should do next would be greatly appreciated.
If there is an alternate method to get up and running (a preconfigured image) I'm open. I was going to try the Alarm Decoder image but it didn't include the Pi Zero in the list of supported devices.
If there is an alternate method to get up and running (a preconfigured image) I'm open. I was going to try the Alarm Decoder image but it didn't include the Pi Zero in the list of supported devices.