[add]: Error handling

app/__init__.py

@@ -2,6 +2,7 @@ from flask import Flask
 from flask_cors import CORS
 from app.config import Config
 from app.routes import api
+from app.errors import bad_request, method_not_allowed, not_found
 
 def create_app():
     """ Factory function to create a Flask app instance """
@@ -16,4 +17,10 @@ def create_app():
     # Register blueprints
     app.register_blueprint(api)
 
+   
+    # Error Handlers
+    app.register_error_handler(400, bad_request)
+    app.register_error_handler(404, not_found)
+    app.register_error_handler(405, method_not_allowed)
+
     return app