Add Badges to README

[devlinjunker]

• [x] Build status/stable version?
• [x] license?
• [x] dependencies (up to date)
• [x] dev-dependencies (up to date)
• [x] 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:

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

[devlinjunker]

Started this with #49

[devlinjunker]

Going to limit what we do in #49. Create new PRs for other badges, including:

• [ ] tests passing? (need to add workflow to run tests)
• [ ] Code Quality? app.codacy.com
• [ ] Maintainability? codeclimate.com