Increase file max upload size

We should increase the maximun size for the upload files if we want to host the Transformer Kiwi models on Streamlit Sharing.

We can add a `~/.streamlit/config.toml` file with
```
[server]
maxUploadSize = 4000
```
but that file should live in a home somewhere. No idea how that should work on the Streamlit Serving app.