feat(ml) backend takes image over HTTP (#2783)

* using pydantic BaseSetting

* ML API takes image file as input

* keeping image in memory

* reducing duplicate code

* using bytes instead of UploadFile & other small code improvements

* removed form-multipart, using HTTP body

* format code

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

docker/docker-compose.dev.yml

@@ -36,7 +36,6 @@ services:
       - 3003:3003
     volumes:
       - ../machine-learning/app:/usr/src/app
-      - ${UPLOAD_LOCATION}:/usr/src/app/upload
       - model-cache:/cache
     env_file:
       - .env