From the root directory of your recently created wallboard, you just need to type:
git submodule add https://github.com/fletch3555/atlasboard-alerting-package.git packages/alerting
to import the package as git submodule and use any of the widgets and jobs in this package (check the example dashboard alerting to see how).
See also: Package-Atlassian
Shows a list of open incidents from PagerDuty.
"pagerduty": {
}