Thumbnail generation microservice

[cwaring]

Purpose

Currently full resolution images are displayed on the list and index view pages, this creates a heavy payload upon first load so we have an opportunity to greatly optimise the loading speed and experience.

This could later be extended to provide conversion between media types, if we should wish.

Deliverable

Build a proxy service to return cached thumbnail images.

Perhaps something with a url structure like:
objects.slate.host/{CID}/{options*}

Dependencies

imgproxy looks like a great project that we could make use of here, we can even generate video thumbnails and post process previews with additional options.