Better output when building demo

Author: emilk

scripts/setup_web.sh

@@ -3,6 +3,8 @@ set -eu
 script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$script_path/.."
 
+set -x
+
 # Pre-requisites:
 rustup target add wasm32-unknown-unknown