set up container for local development.

backend/.env

backend/index.js

backend/package.json

docker-compose.yml

frontend/.gitignore

frontend/Dockerfile

frontend/README.md

frontend/package-lock.json

frontend/package.json

frontend/public/favicon.ico

frontend/public/index.html

frontend/public/logo192.png

frontend/public/logo512.png

frontend/public/manifest.json

frontend/public/robots.txt

frontend/src/App.css

frontend/src/App.js

frontend/src/App.test.js

frontend/src/index.css

frontend/src/index.js