Fix docker build job. Use 'go' command inside the Dockerfile.
Bump version to 1.0.4

Change-Id: I313943a945f237819f95cd922526f4f0333c11f0
diff --git a/VERSION b/VERSION
index 21e8796..ee90284 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.3
+1.0.4