Add initial setup for a MathJax server to convert TeX input to SVG output. The server responds to POST requests containing TeX math by converting it into an SVG representation. This setup includes:
- package.json with required dependencies and start script
- package-lock.json to lock dependencies
- .gitignore to exclude node_modules
- server.js to handle HTTP requests and MathJax configuration
This setup provides a foundation for further enhancements and integrations related to TeX-to-SVG conversion tasks.
