# Frontend: CMS The Openstad frontend is built upon the ApostropheCMS, there are also a few react application that are run as modules inside ApostropheCMS. The CMS is mostly a tool to create a website around the OpenStad tools. We are not quite there yet, but eventually the tools should be available as [components](/openstad/technical/frontend/using-openstad-components.md). All OpenStad information should be stored through the API in theMySQL database. The CMS data is stired in the frontend Mongo DB. Some standard functionality is available in the Apostrophe framework, but not or hardly used because it is also provided in teh OpenStad tools. For example caching and tagging of content. The main repo can be found at --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.openstad.org/openstad/technical/frontend.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.