Add claude config

config.py

@@ -4,6 +4,12 @@ Configuration settings for the invoice extraction system.
 
 import os
 import platform
+from pathlib import Path
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+env_path = Path(__file__).parent / '.env'
+load_dotenv(dotenv_path=env_path)
 
 
 def _is_wsl() -> bool:
@@ -21,14 +27,22 @@ def _is_wsl() -> bool:
 
 
 # PostgreSQL Database Configuration
+# Now loaded from environment variables for security
 DATABASE = {
-    'host': '192.168.68.31',
-    'port': 5432,
-    'database': 'docmaster',
-    'user': 'docmaster',
-    'password': '0412220',
+    'host': os.getenv('DB_HOST', '192.168.68.31'),
+    'port': int(os.getenv('DB_PORT', '5432')),
+    'database': os.getenv('DB_NAME', 'docmaster'),
+    'user': os.getenv('DB_USER', 'docmaster'),
+    'password': os.getenv('DB_PASSWORD'),  # No default for security
 }
 
+# Validate required configuration
+if not DATABASE['password']:
+    raise ValueError(
+        "DB_PASSWORD environment variable is not set. "
+        "Please create a .env file based on .env.example and set DB_PASSWORD."
+    )
+
 # Connection string for psycopg2
 def get_db_connection_string():
     return f"postgresql://{DATABASE['user']}:{DATABASE['password']}@{DATABASE['host']}:{DATABASE['port']}/{DATABASE['database']}"