Upgrade to latest version of Aurelia, remove pouch and CSV dependencies

[njovin]

• Upgrades to latest stable version of Aurelia framework
• Refactors some code to use ES modules instead of relying on included vanilla JS files
• Allows running builds with no dependencies other than npm
• Adds support for running locally with Docker
• Adds .env based config management
• Removes committed compiled build/dist files
• See https://github.com/dscsa/server/pull/58 for complimentary changes to server