v1.2.1

🎉 What's New in v1.2.1

This release brings significant new features focused on template processing, performance optimization, and production-ready Docker improvements.

✨ Major Features

🎨 Template Processing & Batch Rendering

• New Template Processing Engine: Added Mustache-based template processing support for dynamic MJML content
• Batch Rendering Endpoint: Introduced /render-batch endpoint for rendering multiple MJML templates in a single request
• Template Variables: Support for dynamic variable substitution in MJML templates using Mustache syntax

🚦 Rate Limiting

• Built-in Rate Limiting: Added express-rate-limit integration to protect against abuse
• Configurable Options:
  • --rate-limit-window: Set time window for rate limiting (default: 15 minutes)
  • --rate-limit-max: Set maximum requests per window (default: 100)
• Flexible Configuration: Rate limiting can be enabled/disabled based on your needs

🐳 Docker Improvements

Production-Ready Dockerfile

• Multi-stage Build: Optimized build process with dedicated build and production stages
• Security Enhancements: Running as non-root user with proper permission management
• Health Check: Integrated health check endpoint for container orchestration
• Smaller Image Size: Improved layer caching and reduced final image footprint
• Multi Architecture Support: Official support for both linux/amd64 and linux/arm64 architectures

📚 Documentation

• Enhanced README: Comprehensive documentation updates including:
  • Rate limiting configuration examples
  • Template processing usage guide
  • Batch rendering API documentation
  • Docker deployment best practices
  • Updated API examples with new endpoints

🔧 Dependencies

New Dependencies

• express-rate-limit@8.2.1: Rate limiting middleware
• mustache@4.2.0: Template processing engine

Updated Dependencies

• express@5.1.0: Upgraded to Express v5
• Multiple dev dependency updates for better tooling and security

🧪 Testing

• Improved Test Coverage: Added comprehensive tests for new template processing features
• Code Formatting: Better test file formatting and organization

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📦 Installation

Docker

Pull the latest v1.2.1 image:

docker pull mactorient/mjml-server:1.2.1

Run the server:

docker run -p 15500:15500 mactorient/mjml-server:1.2.1

Detailed usage instructions can be found in README.md documentation.

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📝 Full Changelog

Version: 1.2.1
Release Date: January 2026
Previous Version: 1.1.0

For detailed commit history, see: v1.1.0...v1.2.1

🐛 Bug Reports & Feature Requests

Found a bug or have a feature request? Please open an issue on GitHub.

mjml-server v1.1.0

What's Changed

• Add env support, HTTP Basic Auth and Improved CLI options by @mertemr in #2

Docker image

docker pull mactorient/mjml-server:1.1.0

Full Changelog: v1.0.0...v1.1.0