complete the first 'getting-started' example (#8829)
complete the first 'getting-started' example (#8829)

This page is very likely the first example a new user sees, so we should make it clear how to actually use the config and setup show to actually render a chart.
chartjs/Chart.js,chartjs/Chart.js,chartjs/Chart.js,nnnick/Chart.js,touletan/Chart.js,touletan/Chart.js,touletan/Chart.js,chartjs/Chart.js,touletan/Chart.js