This will prevent the api from trying to serve network requests in
systems where libnetwork is not enabled, returning 404 responses in any
case.
Signed-off-by: David Calavera <david.calavera@gmail.com>
It defines global middlewares for every request.
This makes the server slightly more composable.
Signed-off-by: David Calavera <david.calavera@gmail.com>