Use same docker image in CircleCI for all jobs (#158)

Also attach to entire workspace instead of current directory.

Author: owais

.circleci/config.yml

@@ -94,9 +94,9 @@ jobs:
   publish-dev:
     docker:
       - image: circleci/golang:1.14
+
     steps:
-      - attach_workspace:
-          at: .
+      - attach_to_workspace
       - setup_remote_docker
       - run:
           name: Build image