add usage info to build script

pmaier1 · pmaier1 · commit 065b7b7c46ed · 2016-12-22T15:54:21.000+01:00
diff --git a/build.sh b/build.sh
@@ -2,6 +2,7 @@
 
 source .env
 
+[[ "$#" < 1 ]] && echo "Usage: build.sh username" && exit 
 USER=$1
 echo -n Password: 
 read -s PASS
