Plausible metrics

Use (Andy Yates) Plausible for metrics

```html
<script defer data-domain="petals.team" src="https://plausible.io/js/script.file-downloads.hash.outbound-links.pageview-props.revenue.tagged-events.js"></script>
<script>window.plausible = window.plausible || function() { (window.plausible.q = window.plausible.q || []).push(arguments) }</script>
```