remove unused containers and images as part of deploy to ensure enough space

.gitlab-ci.yml

@@ -37,6 +37,8 @@ deploy_dev:
   script:
     - echo "deploying dev"
     - docker login -u $DOCKERHUBUSER -p $DOCKERHUBPASSWORD docker.io
+    - docker rm $(docker ps -a -q)
+    - docker images -q |xargs docker rmi
     - docker pull l1ll1/tes:latest
     - docker stop l1ll1/tes:latest
     - docker run -p 8080:8080 l1ll1/tes:latest