Add New /dog Route with Random Response

Description

Add a new endpoint /dog to the microservice that randomly returns either "woof" or "bark" when called with a GET request.

Technical Requirements

• Add new route /dog that accepts GET requests
• Implement random selection between two possible responses: "woof" or "bark"
• Follow existing project structure and coding standards
• Add appropriate unit tests
• Update readme

Implementation Details

Create new handler

• Add DogHandler struct in handlers package
• Implement handler method with random response logic
• Use Go's math/rand package for randomization

Update routing

• Add new route to router setup
• Group with existing endpoints under /api prefix

Testing

• Add unit tests for the new handler
• Test both possible responses
• Test invalid HTTP methods

Documentation

• Add example usage in README