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.

frontend/vite.config.js

@@ -13,7 +13,7 @@ export default defineConfig({
     port: 3000,
     proxy: {
       '/api': {
-        target: 'http://localhost:8002',
+        target: 'http://localhost:8083',
         changeOrigin: true
       }
     }