Implement a /healthcheck endpoint

[jelveh]

Description

We need to add a /healthcheck endpoint to our application for monitoring its health status. This endpoint is crucial for:

• Monitoring: Allows external systems and alert systems to check the application's health.
• Deployment: Ensures the application is healthy before directing traffic.
• Troubleshooting: Provides insights into any issues.

Tasks

1. Endpoint Implementation: Create /healthcheck endpoint.
2. Health Check Logic: Implement logic to check application's basic health.
3. Response Format: Define response format for /healthcheck.