POST method does not work

`curl -X POST 'https://r.jina.ai/' -d 'url=https://example.com/#/route' `

return

```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot POST /</pre>
</body>
</html>
```
