[skip ci] docs - database stub

docs/database/quick-start.md

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+---
+title: Quick Start
+description: Get to grips with the basics of Realtime Database in React Native Firebase
+---
+
+# Realtime Database Quick Start
+
+## Installation
+
+Install this module with Yarn:
+
+```bash
+yarn add @react-native-firebase/database
+```
+
+> Integrating manually and not via React Native auto-linking? Check the setup instructions for <Anchor version group href="/android">Android</Anchor> & <Anchor version group href="/ios">iOS</Anchor>.
+
+## Module usage
+
+Once installed, import the Cloud Functions package into your project:
+
+```js
+import database from '@react-native-firebase/database';
+```
+
+The package also provides access to the firebase instance:
+
+```js
+import { firebase } from '@react-native-firebase/database';
+```
+
+### Read and Write Data
+
+### Realtime Data Sync
+
+### FlatList and lists of data
+
+### Enable Offline Capabilities