commit docs website

.gitignore

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 .bundle/
 #vendor/
 .history/
-docs/
 *.ini
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assets/bower_components/katex/docs/cli.md.template

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+---
+id: cli
+title: CLI
+---
+
+KaTeX installed [using Node.js package managers](node.md) comes with a
+built-in command-line interface (CLI) which can be used to render TeX to HTML.
+By default, CLI will take the input from standard input.
+
+```bash
+npx katex
+```
+
+> Above uses the `npx` command to run the locally installed executable
+after `npm install katex`.  You can also execute with the relative path:
+`./node_modules/.bin/katex`
+
+> To use the CLI from local Git clone, you need to build the project first.
+See [Building from Source](node.md#building-from-source) for more details.
+
+## Options