Back-end: uploading Images in Moments and Strategies

[bmwachajr]

Description

We want to have a backend API endpoint that uploads images to Cloudinary.

reference feature: #798

Reproduction Steps

Screenshots

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[bmwachajr]

Current flow as at #7c44105

moments picture endpoint >> moments controller picture action with params moment id and image >> Cloudinary service action upload picture and return cloudinary response json, returns the image public_id to the >> picture action, update moments.picture entry.