Attempt to fix dockerhub build

Change-Id: I7feb604de7c3d616e99db6d7557849132fd05010
diff --git a/tools/build/docker/Dockerfile b/tools/build/docker/Dockerfile
index 1269ef1..17f65ab 100644
--- a/tools/build/docker/Dockerfile
+++ b/tools/build/docker/Dockerfile
@@ -13,7 +13,7 @@
 ENV JAVA_HOME /usr/lib/jvm/java-8-oracle
 ENV BUILD_NUMBER docker
 
-COPY . /src/onos
+COPY . /src/onos/
 
 #Download and Build ONOS
 WORKDIR /src