Update README.md

backend/README.md

@@ -58,17 +58,12 @@ https://docs.sqlalchemy.org/en/20/changelog/migration_20.html#migration-20-query
 
 ```python
 
-# Create Flask app
-app = Flask(__name__)
 
-# Enable CSRF on all api endpoints
-csrf = CSRFProtect(app)
-
-# Define Content Security Policies
-talisman = Talisman(app, content_security_policy=csp)
-
-# Initialize Flask-Security
-user_datastore = SQLAlchemyUserDatastore(db, User, Role)
-app.security = Security(app, user_datastore)
+app = Flask(__name__) # Create Flask app
+db = SQLAlchemy() # Integrates SQLAlchemy with Flask.  
+csrf = CSRFProtect(app) # Enable CSRF 
+talisman = Talisman(app, content_security_policy=csp) # HTTP Security
+user_db = SQLAlchemyUserDatastore(db, User, Role) # Connect User tables
+app.security = Security(app, user_db) # Initialize Flask-Security
 
 ```
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