Data source documentation

• Start a separate branch and make changes in connections.yaml file.
  Note: Changes to connections.yaml will automatically be converted to JSON format (connections.json) as part of the npm start script

• In the project directory, run npm install within a command line.

• Next, run npm start.
  This runs the app in the development mode and will automatically open http://localhost:3000 to view it in your browser.
  Note: The page will reload when you make changes. You may also see any lint errors in the console.

• After changes have been validated, make a pull request to master branch