feat: add env tag doc

docs/docs/fragments/_cloud_only_notification.mdx

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+:::note
+
+<p>This {props.feature} feature is exclusively available for Logto Cloud.</p>
+:::

docs/docs/recipes/custom-domain/README.md → docs/docs/recipes/custom-domain/README.mdx

@@ -2,13 +2,13 @@
 sidebar_position: 9
 ---
 
+import CloudOnlyNotification from '../../fragments/_cloud_only_notification.mdx';
+
 # 🌍 Custom domain
 
-You can use your own domain name for your Logto tenant. This feature lets you present a consistent brand by having your own domain name on the sign-in and registration pages, as well as on the Management API.
+<CloudOnlyNotification feature="custom domain" />
 
-:::note
-Please note, this custom domain feature is exclusively available for Logto Cloud.
-:::
+You can use your own domain name for your Logto tenant. This feature lets you present a consistent brand by having your own domain name on the sign-in and registration pages, as well as via the Management API.
 
 ## Advantages of Using a Custom Domain
 

docs/docs/recipes/environment-tags/README.mdx

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+---
+sidebar_position: 13
+---
+
+import CloudOnlyNotification from '../../fragments/_cloud_only_notification.mdx';
+
+# 🏷️ Environment Tags
+
+<CloudOnlyNotification feature="environment tag" />
+
+Logto just enhanced the current environment tag features and introduced a new type of tenant: the Development tenant.
+
+## Type of tenants
+
+There are two types of tenants in Logto Cloud.
+
+### Development
+
+The dev environment is mainly used for testing and should not be used in the production environment. Similar to the Pro plan, it's free forever with some limitations and no subscription required.
+
+### Production
+
+Production is where end-users access the live software and might need a paid subscription. To access a production tenant, you can subscribe to the free, hobby, or pro plan.
+
+:::note
+Please be aware that you can only specify your tenant types during creation; it is not possible to modify the tenant type once it has been created.
+:::
+
+With the new type of tenant differentiation, you can better manage your projects across different environments for efficiency and, at the same time, enjoy the full value of Logto.
+
+## Legacy migration
+
+- Users on the free plan with environment tags "dev" or "prod" will remain unaffected.
+- Free plan users with environment tags set as "staging" will experience the sunset of the staging environment. This tenant type will change from “staging” to “production”, with no impact on the current setup.
+- If you are on the paid plan, regardless of your previous environment tags, all paid tenants will transition to the production category.
+
+## Development tenant limitation
+
+1. The development tenant mirrors a Pro plan production tenant, except for the sign-in experience displaying a banner stating that this sign-in experience is only intended for a development environment.
+2. The development tenant doesn’t have a bill or billing history section. It offers unlimited access and free usage of all features.