To install a Form on your website using the Standard widget use the follwing code snippet: 
<script type="module">
  import Form from 'https://cdn.mu.chat/embeds/dist/form/index.js';

Form.initStandard({
formId: 'YOUR_FORM_ID',
});

</script>
<muchat-form-standard />
Replace YOUR_FORM_ID with the ID of your Form
You can find the Form ID in the Form settings under the Settings tab.
See all the available attributes in the Form Reference