Ding Dong PWA is released.

The first version is pushed live to Firebase hosting and released. Web app runs smoothly, but there's room for optimisation.
Currently ALL character data is loaded onto the DOM at once, and there is a modal for each character. Although this doesn't affect performance (and Lighthouse hates it), there should ideally be a single modal that has placeholders for each character. The data from the JSON file should be loaded into the single modal box when it's required.