Update README.md

README.md

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 Typst math typesetting for the web.
 
 ## Getting started
-> TODO
+### Installation
+Install wypst with npm:
+```bash
+npm install wypst
+```
+### Importing
+You can import wypst as an ECMAScript module:
+```javascript
+import wypst from 'wypst';
+```
+### Rendering Typst Math
+To render a Typst math expression, you can use either `render` or `renderToString`, as the example below shows:
+```javascript
+wypst.render('sum_(n >= 1) 1/n^2 = pi^2/6', element); // Renders into the HTML element
+wypst.renderToString('sum_(n >= 1) 1/n^2 = pi^2/6'); // Renders into an HTML string
+```
+
+## Contributing
+> TODO
+
+## Disclaimer
+As of now wypst is very experimental, so you may encounter lots of bugs. I expect to have most fixed by mid March.