updating pipeline script

bitbucket-pipelines.yml

@@ -10,15 +10,11 @@ options:
   docker: true
 
 pipelines:
-  default:
-    - step:
-        script:
-          # Set $DOCKER_HUB_USERNAME and $DOCKER_HUB_PASSWORD as environment variables in repository settings
-          - export IMAGE_NAME=ldooks/dragon-bot:latest
   branches:
     master:
       - step:
           script:
+            - export IMAGE_NAME=ldooks/dragon-bot:latest
             # build the Docker image (this will use the Dockerfile in the root of the repo)
             - docker build -t $IMAGE_NAME .
             # authenticate with the Docker Hub registry