Convert reactjs website into an installable webapp with push notifications.

Translate legacy reactjs site to an offline first mobile first responsive web app. Project Details: See the file attached under "Files" tab. This should be a fairly hands-on simple task to make an installable web app. I need a stub push notification which notifies the user when the app has been installed on the device clicking on which should open the app. A good starting reference would be the base budget of around 94 USD and I am open to negotiate and understand why it should go beyond this limit should you be interested in working on this task.