Setup Cloudinary storage provider

[JadeMaveric]

We're currently using local storage as our storage provider. This works fine on local builds. But local storage is volatile on heroku.
Strapi does allow for alternate storage providers
Cloudinary is one such provider, that has quite a generous free tier. Using it requires the following npm modules

• Switch storage provider to cloudinary. (use your own auth keys for now, I'll switch them to mine once the PR is verified)

[NeilBotelho]

Cloudinary seems like its just for image and video upload is that what we want?

[vipulchodankar]

We'll primarily deal with images and PDFs for courses, notices, announcements etc.

We could also put videos I guess, but it might be easier to put that up as an unlisted video on YouTube or something.

Secondarily, we could use it for profile pictures, not a priority though I suppose.