chore(image-assets) : Serve images in next-gen formats

[jedihacks]

[Wholloran]

See if Rachel and a developer can generate the assets in a file format like this( JPEG 200, JPEG XR, and WebP)

[Fdom92]

Here is the support for those types of imgages:

JPEG XR
For IE and Edge
https://caniuse.com/#feat=jpegxr

JPEG 2000
For iOS, Safari
https://caniuse.com/#search=JPEG%202000

WebP
For Chrome, Android, Opera, Samsung Internet
https://caniuse.com/#feat=webp