gitlab ci script updated

.gitlab-ci.yml

 ---
-cache:
-  paths:
-  - install/
-
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
-dune:git--gcc:
-  image: mathiwr/dune:latest
+debian:10 gcc-8-17:
+  image: registry.dune-project.org/docker/ci/dune:2.6-debian-10-gcc-8-17
+  script:
+  - duneci-standard-test
+  - dunecontrol --current make examples
+
+debian:10 clang-6-libcpp-17:
+  image: registry.dune-project.org/docker/ci/dune:2.6-debian-10-clang-6-libcpp-17
+  script:
+  - duneci-standard-test
+  - dunecontrol --current make examples
+
+debian:9 gcc-6-14:
+  image: registry.dune-project.org/docker/ci/dune:2.6-debian-9-gcc-6-14
+  script:
+  - duneci-standard-test
+  - dunecontrol --current make examples
+
+ubuntu:18.04 clang-6-17:
+  image: registry.dune-project.org/docker/ci/dune:2.6-ubuntu-18.04-clang-6-17
   script:
-  - dunecontrol --current all
-  - dunecontrol --current make build_tests
-  - dunecontrol --current make test
-  only:
-  - develop
+  - duneci-standard-test
+  - dunecontrol --current make examples