Files uploaded to Gaia with the CLI does not have the right content type

[pradel]

Describe the bug

It looks like when uploading a file to Gaia using the CLI the content type is lost causing the web app SDK to be unable to pull files.

File created using the SDK directly in the web app, content type is correct

File uploaded via the CLI, content type is octet-stream

To reproduce, simply upload a file to gaia using the CLI and see that the content type is not preserved.

[pradel]

Might be related to #1405