Refactor environment variable loading in app.py for improved clarity

app.py

@@ -7,7 +7,6 @@ from typing import List
 import asyncio
 import os
 from concurrent.futures import ThreadPoolExecutor
-from dotenv import load_dotenv
 from src.Generate_caption import load_model_from_path, tokenizer_load
 from src.Color_extraction import extract_colors
 from src.Generate_productName_description import generate_product_name, generate_description, clean_response
@@ -17,8 +16,7 @@ import tempfile
 app = FastAPI()
 
 # Load environment variables
-load_dotenv()
-API_KEY = os.environ.get("APIKEY")
+API_KEY = os.getenv("APIKEY")
 if not API_KEY:
     raise ValueError("API_KEY not set. Please configure your .env file or system environment.")