Add Badges to README

[devlinjunker]

• Build status/stable version?
• license?
• dependencies (up to date)
• dev-dependencies (up to date)
• documentation link
  • https://github.com/Naereen/badges#read-the-docs-status
  • esdoc badge
• npm version?
• node version?
• tests passing? https://help.github.com/en/actions/configuring-and-managing-workflows/configuring-a-workflow#adding-a-workflow-status-badge-to-your-repository
• Coverage (https://codecov.io/)
• Code Quality? app.codacy.com
• Maintainability? codeclimate.com
• contributors? https://github.com/badges/shields/graphs/contributors
• commits/week? https://github.com/badges/shields
• add engines.node to package.json (lowest node version supported)
  https://shields.io/
• http://app.fossa.com

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Other README stuff:

• add link to wiki in README
• Also cleanup todos to other file (notes.md - eventually move all to github issues)
• add gif of command line install/startup and server response