For this exercise, we will build a single-page group chat web application with asynchronous Javascript and a REST API written in Python with Flask.

Like the original, Watch Party 2 lets users start group chats and invite their friends. This time, however, we serve a single static HTML page and never redirect or reload. Instead, the page interacts purely with the JSON API.

Starting with the files included in this directory, implement the UI for Watch Party in HTML, CSS, and Javascript, and serve it using server-side code written in the latest stable version of Python (3.11.2) and Flask. Routes to serve the static content are provided, so you will only need to implement the API endpoints in app.py and the javascript in script.js. You are however free to modify any other file if it makes development more convenient.