added readme and updated preview image

README.md

@@ -0,0 +1,32 @@
+![sidebase website](./.github/preview.png)
+
+# sidebase docs
+
+The sidebase homepage (https://sidebase.io), including the documentation for the sidebase development kit.
+
+## Quick start
+
+1. Clone the repository
+    ```sh
+    git clone https://github.com/sidebase/docs
+    ```
+2. Install the dependencies
+    ```sh
+    pnpm install
+    ```
+3. Start developing (with [vitepress](https://vitepress.dev/)) at [localhost:5173](http://localhost:5173)
+    ```sh
+    pnpm dev
+    ```
+
+## Contributing
+
+This repository only contains:
+
+- The sidebase.io homepage
+- The sidebase development kit documentation
+- Redirects from previous documentation to their respective new sites
+
+If you would like to edit the documentation to one of our modules, please visit their respective repositories
+
+- [@sidebase/nuxt-auth](https://github.com/sidebase/nuxt-auth)