add docker packaging and gitlab-ci build

.gitlab-ci.yml

 image: docker:latest
 
+stages:
+- build
+- tag
+
+variables:
+  CONTAINER_TEST_IMAGE: gitlab-registry.cern.ch/fts/fts-rest:latest
+  CONTAINER_RELEASE_IMAGE: gitlab-registry.cern.ch/fts/fts-rest:$CI_BUILD_REF_NAME
+
 before_script:
     - docker info
     - docker login -p "${REGISTRY_PASSWD}" -u "${REGISTRY_USER}" gitlab-registry.cern.ch
-    
+
 after_script:
     - docker logout gitlab-registry.cern.ch
 
-job1:
+build:
+    stage: build
+    only:
+      - develop
     script:
-        - docker build -t  gitlab-registry.cern.ch/fts/fts-rest  packaging/docker
-        - docker push gitlab-registry.cern.ch/fts/fts-rest 
+      - docker build --pull -t $CONTAINER_TEST_IMAGE packaging/docker
+      - docker push $CONTAINER_TEST_IMAGE
     tags:
-        - docker 
+      - docker
+tag:
+    stage: tag
+    only:
+        - tags
+    script:
+        - docker build  -t $CONTAINER_RELEASE_IMAGE --build-arg ftsrepo=http://fts-repo.web.cern.ch/fts-repo/fts3-rc-el7.repo  --build-arg dmcrepo=http://dmc-repo.web.cern.ch/dmc-repo/dmc-rc-el7.repo  packaging/docker
+        - docker push $CONTAINER_RELEASE_IMAGE  
+    tags:
+       - docker
+

packaging/docker/Dockerfile

@@ -9,22 +9,23 @@ RUN /usr/bin/rpm --import /tmp/RPM-GPG-KEY-cern \
         && rm /tmp/RPM-GPG-KEY-cern \
         && rm -rf /var/cache/yum
 
-# Add EPEL repos
-ADD  http://mirror.switch.ch/ftp/mirror/epel/7/x86_64/e/epel-release-7-8.noarch.rpm  /tmp/epel-release-7-8.noarch.rpm
-RUN  yum localinstall /tmp/epel-release-7-8.noarch.rpm -y \
+#add EPEL repos
+ADD  http://mirror.switch.ch/ftp/mirror/epel/epel-release-latest-7.noarch.rpm  /tmp/epel-release-7.noarch.rpm
+RUN  yum localinstall /tmp/epel-release-7.noarch.rpm -y \
         && /usr/bin/yum --enablerepo=*-testing clean all \
-        && rm /tmp/epel-release-7-8.noarch.rpm \
+        && rm /tmp/epel-release-7.noarch.rpm \
         && rm -rf /var/cache/yum
 
 # add FTS repo
-ADD http://grid-deployment.web.cern.ch/grid-deployment/dms/fts3/repos/fts3-continuous-el7.repo /etc/yum.repos.d/fts.repo
+ARG ftsrepo=http://fts-repo.web.cern.ch/fts-repo/fts3-continuous-el7.repo
+ADD $ftsrepo /etc/yum.repos.d/fts.repo
 
 #add DMC repo
+ARG dmcrepo=http://dmc-repo.web.cern.ch/dmc-repo/dmc-ci-el7.repo
+ADD $dmcrepo /etc/yum.repos.d/dmc.repo
 
-ADD http://grid-deployment.web.cern.ch/grid-deployment/dms/lcgutil/repos/dmc-ci-el7.repo /etc/yum.repos.d/dmc.repo
+RUN /usr/bin/yum clean all
 
-
-#install fts packages
 RUN /usr/bin/yum install -y fts-rest-selinux fts-rest httpd MySQL-python 
 
 RUN /usr/bin/yum install -y voms-config-wlcg  voms-config-vo-dteam
@@ -36,5 +37,3 @@ RUN usermod -a -G fts3 apache
 #expose ports
 
 EXPOSE 8446
-
-CMD /bin/bash