replace hardcoded registry with variable

build/ci/.build-container.yml

@@ -39,5 +39,5 @@ build-docker:
    - docker push $DOCKER_IMAGE_SHA
    - docker tag $DOCKER_IMAGE_SHA $TAG
    - docker push $TAG
-   - docker build --target installer --build-arg GITLAB_USER=$GO_MODULES_USER --build-arg GITLAB_TOKEN=$GO_MODULES_ACCESS_TOKEN --build-arg BUILDARGS=$BUILDARGS -t registry.code.fbi.h-da.de/cocsn/gosdn:testing_${CI_PIPELINE_ID} .
-   - docker push registry.code.fbi.h-da.de/cocsn/gosdn:testing_${CI_PIPELINE_ID}
+   - docker build --target installer --build-arg GITLAB_USER=$GO_MODULES_USER --build-arg GITLAB_TOKEN=$GO_MODULES_ACCESS_TOKEN --build-arg BUILDARGS=$BUILDARGS -t ${CI_REGISTRY_IMAGE}:testing_${CI_PIPELINE_ID} .
+   - docker push ${CI_REGISTRY_IMAGE}:testing_${CI_PIPELINE_ID}
\ No newline at end of file

build/ci/.test.yml

 .integration-test: &integration-test
-  image: registry.code.fbi.h-da.de/cocsn/gosdn:testing_${CI_PIPELINE_ID}
+  image: ${CI_REGISTRY_IMAGE}:testing_${CI_PIPELINE_ID}
   stage: integration-test
   needs:
     - job: "containerlab:deploy"
@@ -34,7 +34,7 @@ integration-test:api:
     - go test -race -v -run TestApiIntegration
 
 .test: &test
-  image: registry.code.fbi.h-da.de/cocsn/gosdn:testing_${CI_PIPELINE_ID}
+  image: ${CI_REGISTRY_IMAGE}:testing_${CI_PIPELINE_ID}
   stage: test
   allow_failure: true
   variables: