[Feature] Ensure Aria Compliance

[DCRepublic]

To try and make this tool as accessible as possible, work to implement the following web standards..

A quick way to check these are implemented is to use Google's built in performance and accessibility tester Lighthouse. At the time of writing this the current score for the main page is 85% for accessibility, this is good, but can be improved vastly through the use of alt tags for images as well as "aria-labels" on buttons etc.