data base

I need to set up a database and API in azure. 1) I need an API which can receive a JPG (blob format perhaps) and a JSON together in a POST request 2) this API should require a unique key to make a valid request (access key/client ID) 3) the server on Azure should receive the request, and store the contents of the JSON as a single row in a Postgres database. The JSON will consist of several fields include a timestamp, description, , longitude, latitude, and comment, which correspond to the JPG. 4) the JPG ideally should maintain the original EXIF information including timestamp, geolocation, camera compass angle, focal length, camera make, camera model. 5) the Postgres database on Azure should be able to receive thousands of photos at any time 6) i need recommendations on the exact architecture of this system, which is most cost effective, so I am open to suggestions 7) i am open to security recommendations including a rate limit if possible (1 request per second?) Please send proposals that detail how you would structure this system and recommend if paid azure plans would be needed.