Adding empty vendor folder for docker-build

Change-Id: I94266965d78773d7d902e9bd241333d2f1eaa9ba
diff --git a/vendor/.gitignore b/vendor/.gitignore
new file mode 100644
index 0000000..d6b7ef3
--- /dev/null
+++ b/vendor/.gitignore
@@ -0,0 +1,2 @@
+*
+!.gitignore