Timeouts on upload can't be configured

[sevenseacat]

Currently the duration for an upload request is limited to hackney's default, which is 5 seconds. This means we're seeing a lot of timeouts for uploading large images (or running a dev server on not-the-world's-best-internet).

This code:
https://github.com/smeevil/cloudex/blob/master/lib/cloudex.ex#L33
looks like it should set it to 60 seconds, but it doesn't.

The timeout can be manually overridden by adding timeout and/or recv_timeout options here:
https://github.com/smeevil/cloudex/blob/master/lib/cloudex/cloudinary_api.ex#L116-L122
But ideally should be configurable from the calling application.

I suspect this will also affect any of the other API operations that have the manual 60-second Task.await call.

[travelmassive]

I agree - this would be very helpful. 5 seconds isn't long enough. Hopefully the author can accept the PR :)