gcr as build step

wercker.yml

@@ -1,4 +1,4 @@
-box: python:3.5
+box: python:alpine
 services:
   - redis
 build:
@@ -17,11 +17,12 @@ deploy:
         name: gcr.io authentication
         code: |
           echo $GCLOUD_SERVICE_ACCOUNT > ok-server-test.json
-          gcloud auth activate-refresh-token $GCLOUD_ACCOUNT --key-file ok-server-test.json
+          cat ok-server-test.json
+          gcloud auth activate-service-account $GCLOUD_ACCOUNT --key-file ok-server-test.json
           rm ok-server-test.json
           gcloud docker --authorize-only
           export GCR_AUTH_TOKEN=$(cat $HOME/.dockercfg | jq --raw-output '.["https://gcr.io"].auth' | base64 --decode | cut -d ':' -f2)
-    - internal/docker-push:
+    - gcr.io:
         username: _json_key
         password: $GCR_AUTH_TOKEN
         repository: gcr.io/ok-server/ok-v3-web