Add initial files for Audio Dashboard Management System

- Created .env.example for environment variable configuration.
- Added docker-compose.yml for service orchestration.
- Implemented frequency response extraction in extract_frequency_response.py and convert_to_frequency_db.py.
- Generated output files: frequency_response_detailed.json, frequency_response_points.json, frequency_response.csv, and frequency_response_curve.png.
- Included sample measurement data for FiiO FA19 in CSV format.

backend/main.py

@@ -1,6 +1,7 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 import os
+import logging
 from dotenv import load_dotenv
 
 from database import engine, Base
@@ -9,12 +10,25 @@ from routes import brands_router, models_router
 # Load environment variables
 load_dotenv()
 
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+    handlers=[
+        logging.StreamHandler(),  # 输出到控制台
+        logging.FileHandler('logs/app.log', encoding='utf-8')  # 输出到文件
+    ]
+)
+logger = logging.getLogger(__name__)
+
 # Create database tables (only if tables don't exist)
 try:
+    logger.info("Creating database tables...")
     Base.metadata.create_all(bind=engine)
+    logger.info("Database tables created successfully")
 except Exception as e:
-    print(f"Warning: Could not create tables: {e}")
-    print("Continuing without table creation...")
+    logger.error(f"Warning: Could not create tables: {e}")
+    logger.error("Continuing without table creation...")
 
 # Create FastAPI app
 app = FastAPI(