Deploy the Example Ticketing App for demoing the Payment Widget

[MantisClone]

Problem

The existing Checkout Playground is not ideal for demoing to non-technical business people. (It works better for developers)

Proposed Solution

Deploy the Example Ticketing App that uses the Payment Widget and use it when demoing to non-technical business people.

Context

@aimensahnoun developed an example ticketing app for ETHWarsaw that showcases the Payment Widget. This app was used in presentations but was never actually deployed to production.