Add image api to flask server

[jbewing]

This PR adds three new endpoints for the Image API to the Flask server:

• GET /api/images which returns a list of all images stored in the DB with the following body:

  [
  {
   "href": "/api/images/{id}", 
   "title": "<imageTitle>" # title that the image is uploaded with
  }
  ...
  ]

• GET /api/images/{id} -> returns the image itself
• POST /api/images -> accepts file upload input and returns a 201 with the following body:

  {
  "status": "created",
  "href": "/api/images/<imageId>"
  }

Note: the file format isn't necessarily restrictive to images at this point. Tbh, you could just use this as a BLOB storage like S3.

Testing

# I've run the following
poetry run flask run
curl -F "image=@/Users/jbewing/Desktop/a_golden_retriever.jpeg" 127.0.0.1:5000/api/images

And verified that http://127.0.0.1:5000/api/images returns

[{"href":"/api/images/1","title":"a_golden_retriever.jpeg"}]

and http://127.0.0.1:5000/api/images/1 returns

Related Issues: https://github.com/brodigan-e/capstone-POV/issues/4 https://github.com/brodigan-e/capstone-POV/issues/5 cc @DarkAce65