Initial gitlab-ci configuration with compilation step only

source/voronoi/.gitlab-ci.yml

+# docker image containing Developlement Tools and the current Intel compilers based on CentOS 7
+image: iffregistry.fz-juelich.de/docker-images/centos7-intel-compilers
+
+
+before_script:
+  # set +e prevents sourced scripts from aborting if single commands fail (GitLab CI sets `-e` by default)
+  - set +e && source compilervars.sh intel64 && set -e
+  # set environment variables to avoind stack size issue
+  - export OMP_NUM_THREADS=1
+  - export OMP_STACKSIZE=1g
+  - ulimit -s unlimited
+
+
+stages:
+  - build
+
+
+build:intel:
+  stage: build
+  script:
+    - cd prog && make 
+  artifacts:
+    paths:
+      - prog/voronoi.exe
+    expire_in: 1 day