implemented api routes that calls both camera and gpt service

[eriysd]

Description

Fixes # (issue)
#40

• introducing new routes that combines camera service and gpt service to aggregate the backend call made by the client

Issues Faced and Resolutions

Please describe any issues you encountered during development and how you resolved them.

• Issue: initially tried to make calls to cameraController and gptController and use the returned promises to coordinate.
  • Failed because it was returning multiple jason res
  • Resolution: pivoted to making cameraService and gptService

How To Test?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration.

Testcase 1: Postman testing - success

Do:

• Make a post request to http://localhost:8080/api/request with an image file
  • curl --location 'http://localhost:8080/api/request' \ --form 'image=@"/path/to/file"'

Expect:

• Get 200 status with message and data.
• Check the __upload folder and confirm that the photo is uploaded
• The server terminal should print "inside the gpt service"

Terminal output

Testcase 2: Postman testing - fail

Do:

• Make a post request to http://localhost:8080/api/request without an image file
  • curl --location --request POST 'http://localhost:8080/api/request'

Expect:

• Get 400 error as shown below
• no terminal output as it should not call the gpt service