SQLite and JSON toggle support added

Co-authored-by: Copilot <copilot@github.com>

app/config.py

@@ -0,0 +1,24 @@
+"""
+Application Configuration
+Configure database backend and other settings
+"""
+import os
+
+# Database Configuration
+# Set to True to use SQLite, False to use JSON files
+USE_DATABASE = False
+
+# Database URI for SQLite
+basedir = os.path.abspath(os.path.dirname(__file__))
+DATABASE_URI = f"sqlite:///{os.path.join(basedir, 'data', 'products.db')}"
+
+# JSON data directory
+DATA_DIR = os.path.join(basedir, 'data')
+
+# Session configuration
+SESSION_COOKIE_HTTPONLY = True
+SESSION_COOKIE_SAMESITE = 'Lax'
+
+# SQLAlchemy configuration
+SQLALCHEMY_TRACK_MODIFICATIONS = False
+SQLALCHEMY_ECHO = False  # Set to True for SQL debugging