next try

.gitlab-ci.yml

@@ -1,16 +1,27 @@
-image:
-  name: hashicorp/packer:light
-
 before_script:
-  - apk add --no-cache ansible-playbook
+  - docker info
+
+build_image:
+  script:
+    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN $CI_REGISTRY
+    - docker build -t $CI_REGISTRY_IMAGE:latest .
+    - docker push $CI_REGISTRY_IMAGE:latest
+  only:
+    - master
+  tags:
+    - shell
+    - x86
+
+image:
+  name: r.jalr.de/sbruder/packer-ansible
 
 test:
   script:
-    - packer validate packer.json
+    - validate packer.json
 
 build:
   script:
-    - packer build packer.json
+    - build packer.json
   artifacts:
     paths:
     - rootfs.tar

Dockerfile

@@ -0,0 +1,3 @@
+FROM hashicorp/packer
+
+RUN apk add --no-cache ansible