test build

.circleci/config.yml

@@ -25,6 +25,13 @@ jobs:
       - run:
           name: Build Postal Docker Container
           command: docker build -t catdeployed/postal:ubuntu .
+      - run:
+          name: Export Container
+          command: mkdir workspace && cd workspace && docker save --output postal_alpine.tar catdeployed/postal:ubuntu
+      - persist_to_workspace:
+          root: workspace
+          paths:
+            - postal_ubuntu.tar
   deploy:
     machine: true
     working_directory: ~/repo/ubuntu