docs: add details about the new host option of admin (#7142)

www/apps/docs/content/admin/configuration.mdx

@@ -12,7 +12,7 @@ In this document, you'll learn about the different ways you can configure the ad
 
 The plugin accepts the following options:
 
-```js title=medusa-config.js
+```js title="medusa-config.js"
 const plugins = [
   // ...
   {
@@ -27,6 +27,7 @@ const plugins = [
       develop: {
         open: true,
         port: 7001,
+        host: "example.com",
         logLevel: "error",
         stats: "normal",
         allowedHosts: "auto",
@@ -109,6 +110,15 @@ const plugins = [
         expandable: false,
         children: []
       },
+      {
+        name: "host",
+        type: "string",
+        optional: true,
+        defaultValue: "localhost",
+        description: "The host of the backend. This is useful if you're running a development server remotely.",
+        expandable: false,
+        children: []
+      },
       {
         name: "logLevel",
         type: "\"error\" \\| \"none\" \\| \"warn\" \\| \"info\" \\| \"log\" \\| \"verbose\"",
@@ -238,15 +248,13 @@ You can add the following options to the `medusa-admin develop` command:
 
 ## Change Backend URL
 
-### In Development
+### In Development - Disabled Serve
 
-To change the backend's URL that the admin sends request to in development, you must disable the `serve` plugin option and set the `backend` option to the URL of your Medusa backend.
-
-However, this requires you to also set-up the [develop command](#develop-command-options) as the admin will no longer start with the Medusa backend.
+To change the backend's URL that the admin sends request to in development when the `serve` option is disabled, set the `backend` option to the URL of your Medusa backend.
 
 For example:
 
-```js title=medusa-config.js
+```js title="medusa-config.js"
 const plugins = [
   // ...
   {
@@ -261,6 +269,29 @@ const plugins = [
 ]
 ```
 
+### In Development - Enabled Serve
+
+To change the backend's URL when the `serve` option is enabled, set the `host` and `port` properties of the `develop` option to those of the Medusa backend. This is useful when running Medusa remotely in development, such as using GitHub Codespace.
+
+For example:
+
+```js title="medusa-config.js"
+const plugins = [
+  // ...
+  {
+    resolve: "@medusajs/admin",
+    /** @type {import('@medusajs/admin').PluginOptions} */
+    options: {
+      // other options...
+      develop: {
+        port: 7000,
+        host: "example.com",
+      },
+    },
+  },
+]
+```
+
 ### In Production
 
 :::note