Update README with github page link and update 8ULP docs

Signed-off-by: Utkarsh Gupta <utkarsh.gupta@nxp.com>

Author: utkarshguptanxp

README.md

@@ -9,19 +9,25 @@ Select a device, explore its security features and use cases, and jump directly
 
 The i.MX Security Explorer helps users quickly find security-related documentation for NXP i.MX processors. It is a fully static site — no backend, no database — built from YAML data files.
 
+**Live site:** https://nxp-imx-support.github.io/imx-security-explorer
+
 ---
 
 ## Getting Started
 
-### Prerequisites
+> The live site is available at https://nxp-imx-support.github.io/imx-security-explorer — no setup needed.
+>
+> Follow the steps below only if you want to build or run the site locally.
+
+### Prerequisites *(local build only)*
 
 - **Node.js** ≥ 18
 - **npm** ≥ 9
 - **Python** ≥ 3.10 *(admin tool only)*
 
 ---
 
-### Build the Site
+### Build the Site *(optional)*
 
 ```bash
 # Install Node dependencies (first time only)
@@ -31,7 +37,7 @@ npm install
 npm run build
 ```
 
-### Preview Locally
+### Preview Locally *(optional)*
 
 ```bash
 npm run dev

data/documents/secure_boot.yaml

@@ -9,6 +9,7 @@ documents:
     signing and authentication.
   image: ''
   soc:
+  - imx8ulp
   - imx93
   - imx943
   - imx91

data/documents/security_architecture.yaml

@@ -160,6 +160,17 @@ documents:
   soc:
   - imx91
   use-case: []
+- id: imx8ulp_ele_ug
+  title: EdgeLock Enclave User Guide
+  doc_type: User Guide
+  url: https://www.nxp.com/products/i.MX8ULP#myDocument
+  description: User guide for EdgeLock Enclave on i.MX8ULP, providing instructions for
+    ELE integration and usage.
+  image: ''
+  soc:
+  - imx8ulp
+  use-case: []
+
 - id: imx91_ele_ug
   title: EdgeLock Enclave User Guide
   doc_type: User Guide