Domain validation for app publishing with hubspot

Need help with domain validation
We have our public website hosted on hubspot, and as far as I can tell it’s not possibly to upload the provided html file to the root folder under zoomverify.

Hello Tyler,

Thank you for reaching out in relation to Our Domain Validation process. The next steps will be sent to you via DM (Direct Message). Please refer to our domain validation resource: Domain Validation Explanation for any further questions you may have about the process.

Thank you.