http
HTTP/1.1 200 OK
Content-Type: text/html
Permissions-Policy: microphone=(self), camera=(self)
<!DOCTYPE html>
<html>
<head><title>Voice Call</title></head>
<body>
<button id="start">Start Call</button>
<script>
document.getElementById('start').addEventListener('click', async () => {
const stream = await navigator.mediaDevices.getUserMedia({
audio: true,
video: false
});
// Send audio to peers
});
</script>
</body>
</html>