Add gitlab-ci file

.gitlab-ci.yml

@@ -5,11 +5,9 @@ stages:
   - build
 
 check-i18n-job:
+  image: bash:5.0
   stage: test
   script:
-    - apk update
-    - apk upgrade
-    - apk add bash
     - apk add jq
     - grep --version
     - ./utils/findMissingI18nKeys.sh