Adding develop tag.

.gitlab-ci.yml

 image: docker:latest
+
 services:
     - docker:dind
 
+before_script:
+    - apk add make
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.hzdr.de
+
+
 test_build:
     stage: test
-    except:
-        - master
+    only:
+        - develop
     tags:
         - dind
-    before_script:
-        - apk add make
     script:
-        - make build
+        - make build CONTAINER_TAG=develop
+        - make push CONTAINER_TAG=develop
+
 
 build_and_push:
     stage: deploy
@@ -20,9 +26,7 @@ build_and_push:
         - schedules
     tags:
         - dind
-    before_script:
-        - apk add make
-        - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.hzdr.de
     script:
+        - make build
         - make push
 

Dockerfile

 FROM fedora:latest
 
-RUN dnf upgrade -y && \
-    dnf install -y \
+RUN dnf upgrade -y
+RUN dnf install -y \
     nano hostname hwloc procps-ng wget which tree \
-    cmake make gcc g++ gfortran openmpi pkgconf lcov \
+    cmake make gcc gcc-c++ gcc-gfortran openmpi pkgconf lcov \
     munge munge-devel \
     slurm slurm-slurmctld slurm-slurmd \
     libconfig-devel spdlog-devel doxygen graphviz python

Makefile

 CONTAINER_NAME = registry.hzdr.de/pape58/slurm-in-docker
-CONTAINER_TAGS = latest fedora-latest
-CONTAINER      = $(CONTAINER_NAME):$(firstword $(CONTAINER_TAGS))
-CONTAINER_LIST = $(foreach tag,$(CONTAINER_TAGS),$(CONTAINER_NAME):$(tag))
+CONTAINER_TAG  = latest
+CONTAINER      = $(CONTAINER_NAME):$(CONTAINER_TAG)
 
 .PHONY: build push run
 
 build: Dockerfile docker-entrypoint.sh
-	docker build $(foreach c,$(CONTAINER_LIST),-t $(c)) .
+	docker build -t $(CONTAINER) .
 
 push: build
-	docker push $(CONTAINER_LIST)
+	docker push $(CONTAINER)
 
 run: build
 	docker run -ti --rm $(CONTAINER)