Propagate exceptions and remove now-redundant @api.errorhandler

Author: trey-stafford

src/dat_backend/__init__.py

@@ -42,11 +42,11 @@
 cache = Cache(config={"CACHE_TYPE": "SimpleCache", "CACHE_DEFAULT_TIMEOUT": 60})
 cache.init_app(app)
 
+# Required for the error handler below to work correctly.
+app.config.update({"PROPAGATE_EXCEPTIONS": True})
+
 
-# Note: both deocrators are necessary or this function will not work in non-dev
-# environments.
 @app.errorhandler(Exception)  # noqa
-@api.errorhandler  # noqa
 def handle_exception(e):
     """Handle any exceptions raised from the application.