Otherwise nginx buffers uploads which at least with the linux client results
in large files failing to upload and the upload stats not updating.
Signed-off-by: Christoph Reiter <reiter.christoph@gmail.com>
With two declared "environment" compose only takes the second one. In
thi case it means that the letsencrypt companion and reverse-proxy can't
read the neede variables for the setup, making this example to return a
http 503 error.
