Make mock standalone develop

[92shreyansh]

What is expected?
Makeing sure that any developer or contributor can checkout mock-service run it in there local and test all the feature and functionalities

What all to include?

• Postman collection to test
• Readme to guide how to run standalone
• Create stubs and local services when running standalone
• mock-server should run in 3 modes

• Standalone - Source code & Docker
• Local - Source code & Docker
• Deploy - Docker only

• For Standalone :

• For Cache - use local in-memory cache
• For DB - I dont think we use it in mock
• For UI backend there should be a postman to trigger
• For API service there should be a postman
• Logs should be in local file or terminal