Add environment variable support for API key and max workers in OCR API; implement API key verification for secure access

Dockers/ocr-api/test_client.py

@@ -7,10 +7,16 @@ This script demonstrates how to use the OCR API endpoints
 import requests
 import json
 import sys
+import os
 from pathlib import Path
+from dotenv import load_dotenv
+
+# Load environment variables
+load_dotenv()
 
 # API base URL
 BASE_URL = "http://localhost:8000"
+API_KEY = os.getenv("API_KEY")
 
 def test_health():
     """Test the health endpoint"""