Disable composer timeout (5 min) for serve script

[johannschopplich]

I've ran into timeouts some time ago with a similar serve script. I think a more robust solution would be to disable the timeout for the start script.

The default value is 300 seconds (5 minutes).

https://getcomposer.org/doc/03-cli.md#composer-process-timeout

[lukasbestle]

Thank you! 👍