Stonks Boerse is super slow

[pkemkes]

Every click on "Abwarten" takes a long while. Potential reasons:

• server takes long to get all random values
• server takes long to generate new images Potential Solutions:
• let client generate images
• send client batch of values to reduce number of queries to server

[pkemkes]

This commit made it a bit better, but the page is still reloaded every time. This can be improved by using more JS. https://github.com/pkemkes/ctf-challenges/commit/b76e7857ccea5436bec29b829de064a408834bc4