Create endpoint for adding album reviews

[JoseRenan]

Create endpoint on backend to add reviews to track.

endpoint:

/albums/{album id on spotify}/reviews

• POST
  1. It will receive a JSON with the format:

  {
   "user": "userId",
   "album": "id of the album on spotify",
   "rating": 4.5,
   "review": "[OPTIONAL OBJECT TO BE DEFINED]"
  }

  1. Store it in a collection "reviews/albums" (there is a concept of subcollection on firestore) using the firebase cloud firestore, we already have an example using the cloud firestore here
  2. Return the review JSON with its id

if the #69 is already done, this endpoint must be protected to be called only by logged users