Add missing embed.js file to built output

[gxxcastillo]

What:

/embed.js file is missing from the built output.

Why:

While the embed.js file is missing it is not possible to load the embed.js file:

<script async src="https://testing-playground.com/embed.js"></script>

How:

Added embed.js to the built output.

Checklist:

• [ ] Tests N/A
• [x] Ready to be merged