📝 (docs): add custom 404 page and update configuration for better use… (#2553)

…r experience

Introduce a custom 404 page to guide users when they encounter a missing
page. This change enhances user experience by providing helpful
navigation instructions instead of a generic error message.
Additionally, a new configuration file is added to ensure the custom 404
page is served correctly, improving the overall usability of the
documentation site.

Author: MrHinsh

docs/404.md

@@ -0,0 +1,12 @@
+---
+title: 404 | Azure DevOps Migration Tools
+layout: page
+pageType: index
+template: index-template.md
+toc: false
+pageStatus: published
+discussionId: 
+---
+
+
+The page you are looking for may have been moved or deleted! Try to find what you want in the left navigation.

docs/_includes/header.html

@@ -31,7 +31,7 @@
                     <div class="d-flex w-100 justify-content-between">
                         <div class="d-flex">
                             <a class="navbar-brand" href="#">
-                                <img src="/images/nkdagility-with-martin-hinshelwood-light.png" alt="Naked Agility Ltd" width="234" height="99">
+                                <img src="/blob/images/nkdagility-with-martin-hinshelwood-light.png" alt="Naked Agility Ltd" width="234" height="99">
                             </a>
                         </div>
                         <div class="d-flex text-uppercase align-items-center">

docs/staticwebapp.config.json

@@ -0,0 +1,7 @@
+{
+  "responseOverrides": {
+    "404": {
+      "rewrite": "/404"
+    }
+  }
+}