Web dev config: clean up and add to sidenav (#12583)

Fixes #12582

---------

Co-authored-by: Parker Lougheed <[email protected]>

Author: sfshaza2

src/content/platform-integration/web/web-dev-config-file.md

@@ -5,18 +5,19 @@ description: >-
   Centralize web development settings including a development proxy
 ---
 
-# Set up a web development configuration file
-**By Sydney Bao**
-
 Flutter web includes a development server that defaults to
 serving your application in the `localhost` domain using HTTP
 on a randomly assigned port. While command-line arguments offer
 a quick way to modify the server's behavior,
 this document focuses on a more structured approach:
 defining your server's behavior through a centralized `web_dev_config.yaml` file.
 This configuration file allows you to
-customize server settings&emdash;host, port, HTTPS settings, and
-proxy rules&emdash;ensuring a consistent development environment.
+customize server settings—host, port, HTTPS settings, and
+proxy rules—ensuring a consistent development environment.
+
+:::version-note
+Support for the `web_dev_config.yaml` file was added in Flutter 3.38.
+:::
 
 ## Create a configuration file
 

src/data/sidenav.yml

@@ -611,6 +611,8 @@
           permalink: /platform-integration/web
         - title: Set up web development
           permalink: /platform-integration/web/setup
+        - title: Set up a configuration file
+          permalink: /platform-integration/web/web-dev-config-file
         - title: Build a web app
           permalink: /platform-integration/web/building
         - title: Compile to WebAssembly