Flutter: Add http://localhost:3000/ to social provider redirect URI configuration

Author: tyllark

src/fragments/lib/auth/flutter/social_signin_web_ui/10_cli_setup.mdx

@@ -17,12 +17,20 @@ Choose the following options (the last steps are specific to Facebook here but a
     `(default)`
 ? Enter your redirect signin URI: 
     `myapp://`
+? Do you want to add another redirect signin URI 
+    `Yes`
+? Enter your redirect signin URI: 
+    `http://localhost:3000/`
 ? Do you want to add another redirect signin URI 
     `No`
 ? Enter your redirect signout URI: 
     `myapp://`
+? Do you want to add another redirect signout URI 
+    `Yes`
+? Enter your redirect signout URI: 
+    `http://localhost:3000/`
 ? Do you want to add another redirect signout URI 
     `No`
 ? Select the social providers you want to configure for your user pool: 
     `<choose your provider and follow the prompts to input the proper tokens>`
-```
+```