Image build is optimized.

.gitlab-ci.yml

@@ -21,12 +21,12 @@ variables:
   DOCKER_OPTS: "--data-root=/mnt/volume/docker-data"
   DOCKER_MEMORY: "4g"
   DOCKER_CPUS: "2"
-#  DOCKER_HUB_USERNAME: "22baar1mst@hft-stuttgart.de"
-#  DOCKER_HUB_PASSWORD: "" # is set at https://transfer.hft-stuttgart.de/gitlab/ulrike.pado/asyst-moodle-plugin/-/settings/ci_cd
-#  DOCKER_REPO: "22baar1mst/asyst-nlp-grader"
+#  DOCKER_HUB_USERNAME: "22baar1mst@hft-stuttgart.de" # is set at https://transfer.hft-stuttgart.de/gitlab/ulrike.pado/asyst-moodle-plugin/-/settings/ci_cd
+#  DOCKER_PW: "" # is set at https://transfer.hft-stuttgart.de/gitlab/ulrike.pado/asyst-moodle-plugin/-/settings/ci_cd
+#  DOCKER_REPO: "22baar1mst/asyst-nlp-grader" # is set at https://transfer.hft-stuttgart.de/gitlab/ulrike.pado/asyst-moodle-plugin/-/settings/ci_cd
 
 before_script:
-  - docker login -u $DOCKER_USER -p $DOCKER_HUB_PASSWORD
+  - docker login -u $DOCKER_USER -p $DOCKER_PW
 
 build:
   stage: build
@@ -35,6 +35,10 @@ build:
     - name: docker:dind
       command: ["--tls=false", "--storage-driver=overlay2", "--mtu=1500", "--data-root=/mnt/volume"]
   script:
+    - docker system prune -a -f --volumes || true
+    - docker container prune -f || true
+    - docker network prune -f || true
+    - docker image prune -a -f || true
     - docker build --cache-from=$DOCKER_REPO --no-cache --progress=plain -t $DOCKER_REPO -f flask_ml_api/Dockerfile .
     - docker push $DOCKER_REPO
   only: