doc updates/fixes, LTS, caching, etc.

What's Changed

• LICENSE file by @hchiam in #3
• fix travis ci by using an lts version of node by @MichaelDimmitt in #5
• generate the build folder needed for lighthouse cli by @MichaelDimmitt in #4

New Contributors

• @MichaelDimmitt made their first contribution in #5

Full Changelog: 1.0.0...1.1.0

Working Example with Setup Steps

• Minimal React web app with one-liner command
• Setup steps if you start with git clone of this repo
• Setup steps if you start from an empty folder