This documentation will walk you through the steps of building and managing an Ubuntu Core device.
You can find it published on docs.ubuntu.com/core.
To build the documentation you need to install documentation-builder:
$ snap install documentation-builder
Then install the git-repo utility:
$ mkdir $HOME/.bin/
$ export PATH=$PATH:$HOME/.bin/repo
$ curl https://storage.googleapis.com/git-repo-downloads/repo > $HOME/.bin/repo
$ chmod a+x $HOME/.bin/repo
From the root of the documentation source tree do the following to get the Ubuntu Core Stacks bits:
$ repo init -u https://github.com/CanonicalLtd/ubuntu-core-docs.git
$ repo sync
$ documentation-builder
All of the generated documentation will be under build/