chore: readme update, ci update

Author: adiologydev

.github/assets/og.png

@@ -89,7 +89,7 @@ jobs:
           severity: CRITICAL,HIGH
 
       - name: Upload Trivy scan results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@v4
         if: always()
         with:
           sarif_file: trivy-results.sarif

.github/workflows/docker.yml

@@ -1,6 +1,10 @@
+<div align="center">
+<img src=".github/assets/og.png" />
+
 # PixelServe
 
 A high-performance image processing microservice built with Bun, ElysiaJS, and Sharp. Provides on-the-fly image transformations and dynamic Open Graph image generation via simple URL parameters.
+</div>
 
 ## Features
 
@@ -12,6 +16,14 @@ A high-performance image processing microservice built with Bun, ElysiaJS, and S
 - **SSRF Protection** - Blocks private IPs, localhost, and dangerous protocols
 - **Type-Safe** - Full TypeScript with Elysia's TypeBox validation
 
+## Support
+
+If you find PixelServe useful, consider supporting its development:
+
+[![Sponsor on GitHub](https://img.shields.io/badge/Sponsor-GitHub%20Sponsors-ec6cb9?logo=github)](https://github.com/sponsors/climactic)
+
+Your sponsorship helps maintain and improve PixelServe with new features, better documentation, and continued support.
+
 ## Quick Start
 
 ```bash