Convert Email Signature to HTML for ClickUp Integration

I need an existing email signature, provided as an image file, converted to HTML. The final output must ensure compatibility with ClickUp's email signature settings and be optimized for responsiveness as well as proper display in major email clients, especially Gmail and Outlook.

Requirements:
- Compatibility with ClickUp's email signature settings
- Responsiveness and proper display in major email clients (Gmail, Outlook, Apple Mail)
- Clean, lightweight HTML code (no external CSS or scripts)

Ideal Skills:
- Strong HTML/CSS expertise
- Experience with email signature development
- Familiarity with ClickUp and major email clients