eli-389 implementing middleware in app

Author: eddalmond1

src/eligibility_signposting_api/app.py

@@ -17,6 +17,7 @@
 from eligibility_signposting_api.logging.logs_helper import log_request_ids_from_headers
 from eligibility_signposting_api.logging.logs_manager import add_lambda_request_id_to_logger, init_logging
 from eligibility_signposting_api.logging.tracing_helper import tracing_setup
+from eligibility_signposting_api.middleware import SecurityHeadersMiddleware
 from eligibility_signposting_api.views import eligibility_blueprint
 
 if os.getenv("ENABLE_XRAY_PATCHING"):
@@ -62,6 +63,9 @@ def create_app() -> Flask:
     app = Flask(__name__)
     logger.info("app created")
 
+    # Register security headers middleware
+    SecurityHeadersMiddleware(app)
+
     # Register views & error handler
     app.register_blueprint(eligibility_blueprint, url_prefix=f"/{URL_PREFIX}")
     app.register_error_handler(Exception, handle_exception)