"wait -n" needs bash

Author: kzys

script/start-web.sh

@@ -1,7 +1,7 @@
-#! /bin/sh
+#! /bin/bash
 set -ue
 
-if [ "${USE_FASTBOOT:-0}" = 1 ]; then
+if [[ "${USE_FASTBOOT:-0}" = 1 ]]; then
     export USE_FASTBOOT=1
     node --optimize_for_size --max_old_space_size=200 fastboot.js &
     bin/start-nginx ./target/release/server &