Where this goes
Save as _includes/contact.njk and render with {% include "contact.njk" %} in a Nunjucks template.
Create a form in the dashboard and replace YOUR_FORM_ID with your endpoint ID. No account key belongs in this code.
<form action="https://formdrop.wouldairecommend.workers.dev/f/YOUR_FORM_ID" method="POST">
<label for="email">Email</label>
<input id="email" type="email" name="email" required>
<label for="message">Message</label>
<textarea id="message" name="message" required></textarea>
<input name="_gotcha" tabindex="-1" autocomplete="off" hidden>
<button type="submit">Send message</button>
</form>The detail that matters
If your input directory is src, place the include under src/_includes instead.
After you publish
Send a test from the published page, then check Inbox and Spam. Native forms follow a redirect; fetch clients must request JSON and show errors. Set your allowed domains to the hostnames you actually publish, including any preview hostname you need.
Read the endpoint reference for reserved fields, CORS and redirect rules. Start from the accessible contact template if you need styling.