Simple Toy API

Description

Simple toy api that implements 3 endpoints, a simple in-memory cache, is thread safe, and handles multiple requests concurrently.

Endpoints

1. GET /
   • home route that describes/showcases the project's endpoints
2. GET /hello
   • Returns a JSON response with a message: {"message": "Hello, World!"}.
3. POST /reverse:
   • Accepts a JSON payload with a single field text (string).
   • Returns a JSON response with the reversed string: {"reversed": "<reversed_text>"}.
4. GET /factorial/{n}:
   • Returns the factorial of a given integer n passed as a URL parameter.
   • If n is negative, return an error message: {"error": "Input must be a non-negative integer"}.