Add image thumbnail feature

[dadiorchen]

Currently, we are loading the original images into lists, it is pretty slow and unnecessary, we need a thumbnail service to crop the image to show thumbnail.

Reference: https://github.com/Greenstand/treetracker-admin-client/blob/master/src/components/OptimizedImage.js

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[jwgatt]

This one looks decent https://cloudinary.com/documentation/image_transformations

[dadiorchen]

@jwgatt great, I ever used that service, I mean cloudinary.com, it's good, our admin panel team is using this service: https://statically.io/ what do you think? Which one do you prefer. They said it's for free and has no visiting and court limitations.

[VWRoli]

Are you working on this @jwgatt ? Because I have a working solution with https://statically.io/ and the admin client code.

[jwgatt]

I was just investigating to get myself up-to-date. If you have a working solution, go for it.