Update module-admin readme

docs/manage-application.md

@@ -30,7 +30,7 @@ Use the steps below to add the **module-admin** tool to a reSolve application.
    }
    ```
 
-3. Register **module-admin** as a module the application's **run.js** file:
+3. Register **module-admin** as a module in the application's **run.js** file:
 
 ```js
 import resolveModuleAdmin from '@resolve-js/module-admin'

packages/modules/module-admin/README.md

@@ -3,6 +3,69 @@
 [![npm version](https://badge.fury.io/js/@resolve-js/module-admin.svg)](https://badge.fury.io/js/@resolve-js/module-admin)
 ![Analytics](https://ga-beacon.appspot.com/UA-118635726-1/packages-@resolve-js/module-admin-readme?pixel)
 
+Use this module to manage a reSolve application's sagas and read models.
+
+## Installation
+
+Use the steps below to add the **module-admin** tool to a reSolve application.
+
+1. Install the [module-admin](https://github.com/reimagined/resolve/tree/master/packages/modules/module-admin/README.md) NPM package:
+
+   ```bash
+   yarn add @resolve-js/module-admin
+   ```
+
+2. Register a script that runs the **module-admin** tool in the application's **package.json** file:
+
+   ```js
+   "scripts": {
+     ...
+     "module-admin": "module-admin",
+     ...
+   }
+   ```
+
+3. Register **module-admin** as a module in the application's **run.js** file:
+
+```js
+import resolveModuleAdmin from '@resolve-js/module-admin'
+...
+switch (launchMode) {
+  case 'dev': {
+    const moduleAdmin = resolveModuleAdmin()
+    const resolveConfig = merge(
+      defaultResolveConfig,
+      appConfig,
+      devConfig,
+      moduleAdmin
+    )
+  }
+  case 'test:e2e': {
+    const moduleAdmin = resolveModuleAdmin()
+    const resolveConfig = merge(
+      defaultResolveConfig,
+      appConfig,
+      testFunctionalConfig,
+      moduleAdmin
+    )
+  }
+}
+```
+
+## Usage
+
+The **module-admin** tool adds API handlers to a reSolve application and sends queries to these handlers to manage the application. To use the tool, you need to start your application. Then, you can execute **module-admin** with the required command:
+
+```bash
+yarn module-admin read-models reset ShoppingList
+```
+
+The default URL that **module-admin** uses to access an application's API is `http://localhost:3000/api`. Use the `--api-url` option to specify another URL:
+
+```bash
+yarn module-admin --api-url "https://127.0.0.1:2000/api" read-models reset ShoppingList
+```
+
 ## Manage Application
 
 The `system` command manages the application's system.