Ci experiments

.gitlab-ci.yml

-image: parras/nifty:latest
+image: docker:stable
+
+variables:
+  CONTAINER_TEST_IMAGE: gitlab-registry.mpcdf.mpg.de/ift/nifty:$CI_BUILD_REF_NAME
 
 stages:
+  - build_docker
   - test
   - release
 
-variables:
-  DOCKER_DRIVER: overlay
+build_docker:
+  stage: build_docker
+  script:
+    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN gitlab-registry.mpcdf.mpg.de
+    - docker build -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
 
 test_python2_scalar:
+  image: $CONTAINER_TEST_IMAGE
   stage: test
   script:
     - python setup.py install --user -f
@@ -16,24 +25,28 @@ test_python2_scalar:
       coverage report | grep TOTAL | awk '{ print "TOTAL: "$6; }'
 
 test_python3_scalar:
+  image: $CONTAINER_TEST_IMAGE
   stage: test
   script:
     - python3 setup.py install --user -f
     - nosetests3 -q
 
 test_python2_mpi:
+  image: $CONTAINER_TEST_IMAGE
   stage: test
   script:
     - python setup.py install --user -f
     - OMP_NUM_THREADS=1 mpiexec -n 2 nosetests -q 2> /dev/null
 
 test_python3_mpi:
+  image: $CONTAINER_TEST_IMAGE
   stage: test
   script:
     - python3 setup.py install --user -f
     - OMP_NUM_THREADS=1 mpiexec -n 2 nosetests3 -q 2> /dev/null
 
 pages:
+  image: $CONTAINER_TEST_IMAGE
   stage: release
   script:
     - python setup.py install --user -f