docs(site): add missing document for "env show" command

site/content/en/docs/Commands/env/delete.md

@@ -1,7 +1,7 @@
 ---
 title: "env delete"
 linkTitle: "env delete"
-weight: 3
+weight: 4
 ---
 
 ```bash

site/content/en/docs/Commands/env/show.md

@@ -0,0 +1,27 @@
+---
+title: "env show"
+linkTitle: "env show"
+weight: 3
+---
+
+```bash
+$ copilot env show [flags]
+```
+
+### What does it do?
+`copilot env show` shows info about a deployed environment, including region, account ID, and services.
+
+### What are the flags?
+```bash
+-h, --help          help for show
+    --json          Optional. Outputs in JSON format.
+-n, --name string   Name of the environment.
+    --resources     Optional. Show the resources in your environment.
+```
+You can use the `--json` flag if you'd like to programmatically parse the results.
+
+### Examples
+Shows info about the environment "test".
+```bash
+$ copilot env show -n test
+```