'Export image' in builder with jpg is exporting a png

Context

I’ve noticed this while working in https://github.com/CartoDB/cartodb/issues/13865. No matter what format {.png, .jpg} you choose, the same endpoint is called (.png) so you are always getting an image with that format.

Steps to Reproduce

1. Create a map in builder
2. Export as image using .jpg
3. Check the image format (http://checkfiletype.com/).

Current Result

The endpoint called is /api/v1/map/static/center/{token}/{z}/{lat}/{lng}/{width}/{height}.png so the exported is a png.

Expected result

The endpoint called is /api/v1/map/static/center/{token}/{z}/{lat}/{lng}/{width}/{height}.jpg to get a true jpg image.

cc/ @CartoDB/rt-managers

[jesusbotella]

The thing is that the mime type for JPG images is image/jpeg instead of image/jpg, that’s why we’re exporting it in a bad format. 😃

I will fix it right away 😃

[jesusbotella]

Deployed! 🚀