Reduce image size for banned cards

[shenef]

Currently the website seems to load the biggest PNG scryfall offers which causes the site to download about 17 MB of data on the first load.
Scryfall also offers large JPG files with a size of 100-200 kB each: https://scryfall.com/docs/api/images
That should dramatically cut down on load times (which can be a minute and up on mobile) and RAM usage.

[glacials]

👍 Agree, would accept a PR!

[tooomm]

It looks like currently the "large" jpg's are used on the webpage - not the png's anymore.
They have still a unreasonable huge resolution and I can watch them loading...

Edit: That's not the case for all of them. Looks like the large jpg's are a fallback if there is no png available (e.g. "Escape to the Wilds" links to https://c1.scryfall.com/file/scryfall-cards/large/front/3/e/3e26c10b-179f-4a6e-bc8d-3ec1d6783fb9.jpg?1602499769)

Why not use the "normal" sized jpg's for displaying on the webpage? 488 × 680 is still big and should be sufficient there.

[glacials]

See #173