without syntax errors

Define and run a pipeline/.gitlab-ci.yml

-#Code: https://github.com/lucendio/lecture-devops-code/blob/master/tutorials/define-and-run-pipeline/.gitlab-ci.yml
-# und Vorlesung
-#https://docs.gitlab.com/ee/user/packages/container_registry/build_and_push_images.html
-
 workflow:
   rules:
     - if: $CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "main"
@@ -26,27 +22,21 @@ job_build:
   image: 'mirror.gcr.io/library/golang:1.21'
   parallel:
     matrix:
-      - GOOS: 
-        - 'linux'
-        - 'windows'
-        - 'darwin'
-        GOARCH:
-          - 'amd64'
-          - 'arm64'
+      - GOOS: ['linux', 'windows', 'darwin']
+        GOARCH: ['amd64', 'arm64']
   before_script:
     - mkdir -p ./artifacts
-  script: 
+  script:
     - |
-        go build \
-          -o ./artifacts/webservice_${GOOS}_${GOARCH}.bin \
-          ./*.go
+      go build \
+        -o ./artifacts/webservice_${GOOS}_${GOARCH}.bin \
+        ./*.go
   artifacts:
     paths:
       - ./artifacts
 
 job_publish:
   stage: 'publish'
-  rules: 
   image: 'public.ecr.aws/lts/ubuntu:22.04'
   tags:
     - docker-privileged
@@ -59,10 +49,9 @@ job_publish:
   script:
     - |
       for artifact in ./artifacts/*; do
-        chmod +x ${artifact} 
+        chmod +x ${artifact}
         curl \
           --header "Job-TOKEN: ${CI_JOB_TOKEN}" \
           --upload-file ${artifact} \
           "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/artifacts/${version}/"
-      done
-
+      done
\ No newline at end of file