Emojis from animated gif are shown uglily

[zogstrip]

@sam

I am all for including gifcile in our base image

That’s now done

https://github.com/discourse/discourse_docker/commit/dfdd027ad9115e7c7a8e07f66c79a71b012acd03

EDIT: Thanks @sigurdur for all the tests.

I removed the -layers optimize option for GIFs and (with the previous commit) ImageOptim will now use gifsicle to optimize them.

https://github.com/discourse/discourse/commit/d5828d3743ae5701a64db4384b5d2ccfbcc0ed0e