To be updated......
Create a new template - change 'my-new-app' and make it your own.
npx degit dbshanks/gridapp my-new-app
npm install
A variable width flex container system.
<Container width="80%" height="100vh">
<Row>
<Grid height="min-content" sm="100%" md="50%" lg="20%" xl="40%">
Grid Component
</Grid>
</Row>
</Container>
Standard 12 Column Grid system.
<Container width="80%" height="100vh">
<Row>
<GridTest height="min-content" sm="12" md="12" lg="12" xl="12">
12
</GridTest>
</Row>
</Container>