fix #2: read DATABASE_URL from env variable instead of hardcoded pyscure.db

Author: DHANUSHGCODE

backend/database.py

@@ -2,11 +2,16 @@
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
 import datetime
+import os
 
-# SQLite for development, easy to switch to PostgreSQL later
-DATABASE_URL = "sqlite:///./pyscure.db"
+# Fix #2: Read DATABASE_URL from environment variable (set in docker-compose.yml)
+# Falls back to security_logs.db for local development
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./security_logs.db")
 
-engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+# SQLite requires check_same_thread=False; ignored safely for other DBs
+connect_args = {"check_same_thread": False} if DATABASE_URL.startswith("sqlite") else {}
+
+engine = create_engine(DATABASE_URL, connect_args=connect_args)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 
 Base = declarative_base()