Adding additionalBuildArgs for http_proxy and https_proxy

Jenkinsfile

@@ -6,6 +6,7 @@ pipeline {
         dockerfile {
             filename 'Dockerfile'
             dir 'ci'
+	        additionalBuildArgs "--build-arg http_proxy=${env.HTTP_PROXY} --build-arg https_proxy=${env.HTTPS_PROXY}"
         }
     }