refactor: change CI caching to before_script

src/common.ts

@@ -720,12 +720,7 @@ export function getRules(configuration: Configuration): Rules {
   const ciConfig = {
     /* tslint:disable:object-literal-sort-keys */
     image: 'registry.gitlab.com/openstapps/projectmanagement/node',
-    cache: {
-      key: '${CI_COMMIT_REF_SLUG}',
-      paths: [
-        'node_modules',
-      ],
-    },
+    before_script: 'npm ci',
     build: {
       stage: 'build',
       script: [