Updated files

Update the item and list to react components

Update the mongo and mongo-express in file

Add docker files

Add Item.js and add to app.js

Add node api

Update package.json file

Add .bablrc file

Add readme.md file

Update the index.html file

Update the .gitignore file

Update the .eslintrc.json file

Add react hello world

updated package.json to install react-dom

Added index.html