"Content-length" for everest_update.yaml in http header

[Cooky-12]

Hi, I'm trying to write a script to download celeste mod.

Thanks for your "everest_update.yaml", I can process mod dependencies.

But I didn't find "Content-length" in everest_update.yaml download response, it may useful to add "Content-length" to help check download is real complete ?

[maddie480]

All APIs should now return a Content-Length (well, except the bundle-download one because the zip is written on the fly 😅)

[Cooky-12]

Thank you very much ! 😄