API: Add /v1/health endpoint (#178)

* Add healthcheck

- localhost only /healthcheck endpoint
- cURL healthcheck in docker compose file

* Update Healthcheck Response

- change endpoint to /health
- remove localhost restriction
- add docstring

* move healthcheck definition to top of the file

- make the healthcheck show up first in the openAPI spec

* Tree: Format

endpoints/core/router.py

@@ -44,6 +44,13 @@ from endpoints.core.utils.model import (
 router = APIRouter()
 
 
+# Healthcheck endpoint
+@router.get("/health")
+async def healthcheck():
+    """Get the current service health status"""
+    return {"status": "healthy"}
+
+
 # Model list endpoint
 @router.get("/v1/models", dependencies=[Depends(check_api_key)])
 @router.get("/v1/model/list", dependencies=[Depends(check_api_key)])