add help option

consul-bootstrap.sh

@@ -8,10 +8,15 @@
 # exit on error
 set -e
 
-if [ "$#" -eq 0 ]
-then
+if [ "$#" -eq 0 ]; then
   echo "No options specified, exiting."
   exit 1
+elif [ "$#" -eq 1 ] && [ "$1" == "-h" ]; then
+  echo "HashiCorp Consul Bootstrap Script. Provide:"
+  echo "-server for server install,"
+  echo "-bind for the bind interface address,"
+  echo "-server-ip for the server ip address."
+  exit 1
 fi
 
 # create directory if doesn't exist and set permissions