Install Foresite on Eleventy
Paste your Foresite line into the <head> of the base layout your pages use, often _includes/layouts/base.njk:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>{{ title }}</title>
<script defer src="https://t.foresite.dev/s/YOUR_SITE_ID.js"></script>
</head>
<body>
{{ content | safe }}
</body>
</html>
Use the line from your own dashboard (Settings → Install). If some pages use a different layout, add it there too, or have that layout extend the base one.
Visits to localhost aren't counted, so npx @11ty/eleventy --serve won't add test traffic. After you deploy, the Installation Check in Settings → Install turns green with the first pageview.