AI-Aided: Added image border for all images (#8058)

* Added image border for all images

* IME image is clickable

Author: cwarnermm

source/_static/css/mattermost-global.css

@@ -2004,4 +2004,13 @@ mark {
 #check-your-mattermost-client-settings .tab-set .tab-set {
     background-color: var(--color-background-secondary);
     padding: 0rem 1rem 1rem 1rem;
+}
+
+/* Image borders */
+img {
+    border: 1px solid #d3d3d3;
+}
+
+body:not([data-custom-theme="light"]) img {
+    border: 1px solid #4a4a4a;
 }

source/index.rst

@@ -5,6 +5,7 @@ Mattermost's purpose is to accelerate the world's mission critical work by devel
 
 .. image:: /images/ime.png
    :alt: Infographic titled "Mattermost: The Intelligent Mission Environment", showcasing Mattermost as an AI-powered, self-hosted collaboration platform for defense, security, and critical enterprises. It highlights use cases in Cyber Defense, Development, Security, and Operations (DevSecOps), and Mission Operations; a secure collaborative workflow with messaging, automation, audio/screenshare, project tracking, and AI tools; an integration platform with extensible architecture; and a deployment solution with Kubernetes-based, cyber-resilient scalability.
+   :target: about/product.html
 
 .. toctree::
    :maxdepth: 1