docker image for building packages with fpm cookery

.gitignore

+~.un~

.gitlab-ci.yml

+image: docker:stable
+
+stages:
+- build
+- test
+- release
+
+variables:
+  TEST_IMAGE: git.app.uib.no:4567/itpublic/dockerimages/centosfpmcookery:$CI_COMMIT_REF_NAME
+  RELEASE_IMAGE: git.app.uib.no:4567/itpublic/dockerimages/centosfpmcookery:latest
+
+before_script:
+   - echo -n $CI_JOB_TOKEN | docker login -u gitlab-ci-token --password-stdin $CI_REGISTRY
+
+build:
+  stage: build
+  script:
+    - docker build --pull -t $TEST_IMAGE .
+    - docker push $TEST_IMAGE
+
+test:
+  stage: test
+  script:
+    - docker pull $TEST_IMAGE
+
+release:
+  stage: release
+  script:
+    - docker pull $TEST_IMAGE
+    - docker tag $TEST_IMAGE $RELEASE_IMAGE
+    - docker push $RELEASE_IMAGE
+  only:
+    - master
+

Dockerfile

+FROM centos:7
+
+RUN yum -y update \
+    && curl -sL https://rpm.nodesource.com/setup_10.x | bash - \
+    && yum -y install nodejs install epel-release openssl rpm-build rsync which ruby-devel gcc gcc-c++ make \
+    && yum -y install rubygems rake openssh-clients wget \
+    && gem install -N fpm-cookery \
+    && yum -y update