added gitlab-ci file

.gitlab-ci.yml

 ---
-include:
-  - "https://gitlab.dune-project.org/core/ci-config/raw/master/config/common/master.yml"
-  - "https://gitlab.dune-project.org/core/ci-config/raw/master/jobs/common/master.yml"
+.common: &common
+  script: duneci-standard-test
 
 before_script:
   - . /duneci/bin/duneci-init-job
@@ -14,3 +13,34 @@ before_script:
   - duneci-install-module https://gitlab.dune-project.org/staging/dune-functions.git
   - duneci-install-module https://gitlab.dune-project.org/extensions/dune-foamgrid.git
   - duneci-install-module https://gitlab.mn.tu-dresden.de/spraetor/dune-curvedgeometry.git
+
+debian:11 gcc-9-20:
+  <<: *common
+  image: registry.dune-project.org/docker/ci/debian:11
+  variables:
+    DUNECI_TOOLCHAIN: gcc-9-20
+
+debian:10 gcc-8-noassert-17:
+  <<: *common
+  image: registry.dune-project.org/docker/ci/debian:10
+  variables:
+    DUNECI_TOOLCHAIN: gcc-8-noassert-17
+
+debian:10 gcc-7-17:
+  <<: *common
+  image: registry.dune-project.org/docker/ci/debian:10
+  variables:
+    DUNECI_TOOLCHAIN: gcc-7-17
+
+debian:10 clang-7-libcpp-17:
+  <<: *common
+  image: registry.dune-project.org/docker/ci/debian:10
+  variables:
+    DUNECI_TOOLCHAIN: clang-7-libcpp-17
+
+ubuntu:18.04 clang-6-17:
+  <<: *common
+  image: registry.dune-project.org/docker/ci/ubuntu:18.04
+  variables:
+    DUNECI_TOOLCHAIN: clang-6-17
+