Vespa Changes of go.mod and Dockerfile

Change-Id: I09b2d18b1bcff62cf6a1f426f639b72dad5eca99
Signed-off-by: Anupama P <anupama.p@nokia.com>
Signed-off-by: manoj1 <manoj.1.manoj@nokia.com>
diff --git a/Dockerfile b/Dockerfile
index 17bbb25..4bdb14c 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@
 #   platform project (RICP).
 #
 
-FROM golang:1.16 as gobuild
+FROM golang:1.13 as gobuild
 
 # Install utilities
 RUN apt update && apt install -y iputils-ping net-tools curl sudo
@@ -31,6 +31,9 @@
 RUN git clone -b v0.3.0 https://github.com/nokia/ONAP-VESPA.git $GOPATH/src/VESPA
 
 RUN GO111MODULE=on go mod download
+ENV GOLANG_VERSION 1.13.10
+RUN wget --quiet https://dl.google.com/go/go$GOLANG_VERSION.linux-amd64.tar.gz \
+       && tar xvzf go$GOLANG_VERSION.linux-amd64.tar.gz -C /usr/local
 
 # Install VES Agent
 RUN export GOPATH=$HOME/go && \