How can you send an audio wav file through rest services?

I’m working on a project where I analyze emotions through speech. For this project, I have a javascript client where I record the voice and then I send it to a Fastapi API. My AI model is already trained and it works properly in the backend, but I feel worried for the moment when I’ll deploy my API in Azure. I used to save the wav file in the “temp” file and then notify the API through a rest service to access the respective file. That will no longer be the case when I will have my server on the cloud.

Is there a format or way to send my wav files through rest services?

I also want to mention that my client will soon be changed with Vue.js and Vuetify.