FIX: Print usage when config is not passed to launcher.

FIX: Print usage when config is not passed to launcher.

diff --git a/launcher b/launcher
index 06588fd..dad89fc 100755
--- a/launcher
+++ b/launcher
@@ -55,6 +55,11 @@ while [ ${#} -gt 0 ]; do
   shift 1
 done
 
+if [[ -z $config ]]; then
+  usage
+  exit 1
+fi
+
 # Docker doesn't like uppercase characters, spaces or special characters, catch it now before we build everything out and then find out
 re='[[:upper:]/ !@#$%^&*()+~`=]'
 if [[ $config =~ $re ]];

GitHub sha: f80e6a37

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Fix regression due to f80e6a37a9d748f43047141b18986f6386444bc9.