The app uses the following:
* ReactJS
* Express.js

All the dependencies and scripts are mentioned in package.json file.
To run the app:

* npm install
    This should download all the dependencies.
* npm start
    This will run the express server
* npm run watch
    This will host the app.

Working Features
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* Add task
* Delete task
* Add sub task
* Delete sub task
* Highlight missed task
* Show/Hide task description