Resolve "fix empty version issue in CI"

Closes #40 (closed)

.gitlab-ci.yml

@@ -57,8 +57,7 @@ build container image:
     entrypoint: [""]
   script:
     # use tag for version if not empty; else commit sha
-    - "[[ -n ${CI_COMMIT_TAG} ]] && export version=${CI_COMMIT_TAG} || export version=${CI_COMMIT_SHORT_SHA}"
-    - echo $version
+    - "test -n \"$CI_COMMIT_TAG\"  && export version=$CI_COMMIT_TAG || export version=$CI_COMMIT_SHORT_SHA"
     - mkdir -p /kaniko/.docker
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"auth\":\"$(echo -n ${CI_REGISTRY_USER}:${CI_REGISTRY_PASSWORD} | base64 | tr -d '\n')\"},\"$harbor_registry\":{\"auth\":\"$HARBOR_ROBOT_TOKEN64\"}}}" > /kaniko/.docker/config.json
     - /kaniko/executor