feat: Replace logo with transparent background version

Updated the SilverLabs logo to use a transparent background for better
visual appearance against the gradient background. Removed the old logo.jpg
file and updated the Dockerfile to reflect this change.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -5,7 +5,6 @@ COPY index.html /usr/share/nginx/html/
 COPY styles.css /usr/share/nginx/html/
 COPY script.js /usr/share/nginx/html/
 COPY logo.png /usr/share/nginx/html/
-COPY logo.jpg /usr/share/nginx/html/
 
 # Copy SDK directory with templates
 COPY sdk/ /usr/share/nginx/html/sdk/