### Add Himetrica tracker script to index.html

Source: https://himetrica.com/docs

Place this script tag in your HTML to load the Himetrica tracker. Replace YOUR_API_KEY with your actual API key from the project settings. The script is deferred and loads asynchronously.

```html
<script
  defer
  src="https://cdn.himetrica.com/tracker.js"
  data-api-key="YOUR_API_KEY"
></script>
```

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