DOCS: promocards + features

Signed-off-by: jokob-sk <jokob.sk@gmail.com>

docs/index.md

@@ -6,7 +6,39 @@ hide:
 
 # NetAlertX Documentation
 
-Find guides and resources to help you set up, configure, and troubleshoot your NetAlertX instance.
+Guides and resources to help you set up, configure, and troubleshoot NetAlertX.
+
+<div class="promo-card">
+  <h3>Learn</h3>
+  <p>Understand NetAlertX core features, discovery, and alerting concepts</p>
+  <a href="./FEATURES.md" class="promo-button">
+    Explore Features
+  </a>
+</div>
+
+<div class="promo-card">
+  <h3>Install</h3>
+  <p>Step-by-step installation guides for Docker, Home Assistant, Unraid, and bare-metal setups</p>
+  <a href="./INSTALLATION.md" class="promo-button">
+    View Installation Guides
+  </a>
+</div>
+
+<div class="promo-card">
+  <h3>MSP / Security Lite</h3>
+  <p>Learn how NetAlertX provides device presence, alerting, and compliance-friendly monitoring for MSPs</p>
+  <a href="./NOTIFICATIONS.md" class="promo-button">
+    Explore Notifications
+  </a>
+</div>
+
+<div class="promo-card">
+  <h3>Contribute</h3>
+  <p>Source code, development environment setup, and contribution guidelines</p>
+  <a href="./DEV_ENV_SETUP.md" class="promo-button">
+    Contribute on GitHub
+  </a>
+</div>
 
 ![Preview](./img/devices_split.png)