a simple hello world Material Design web app
https://material.io/develop/web/
https://material.io/collections/developer-tutorials/#web
https://material-components.github.io/material-components-web-catalog/#/
https://codelabs.developers.google.com/codelabs/mdc-101-web/#1
https://material.io/develop/web/components/input-controls/text-field/
https://material-components.github.io/material-components-web-catalog/#/component/button?type=text
https://google.github.io/material-design-icons/#icon-font-for-the-web
https://material-components-web.appspot.com/text-field.html
https://medium.com/dev-channel/getting-started-with-material-design-components-for-web-3cb30fbac7d8