Remove hard-coded references to GitLab.com

This commit updates the NPM .gitlab-ci.yml template to not include
hard-coded references to GitLab.com.

changelogs/unreleased/nfriend-fix-npm-template.yml

+---
+title: Remove hardcoded reference to gitlab.com in NPM .gitlab-ci.yml template
+merge_request: 36124
+author:
+type: fixed

lib/gitlab/ci/templates/npm.gitlab-ci.yml

@@ -34,9 +34,9 @@ create_npmrc:
         echo 'No .npmrc found! Creating one now. Please review the following link for more information: https://docs.gitlab.com/ee/user/packages/npm_registry/index.html#authenticating-with-a-ci-job-token'
 
         {
-          echo "@${CI_PROJECT_ROOT_NAMESPACE}:registry=\${CI_SERVER_URL}/api/v4/projects/${CI_PROJECT_ID}/packages/npm/"
-          echo '//gitlab.com/api/v4/packages/npm/:_authToken=${CI_JOB_TOKEN}'
-          echo '//gitlab.com/api/v4/projects/${CI_PROJECT_ID}/packages/npm/:_authToken=${CI_JOB_TOKEN}'
+          echo '@${CI_PROJECT_ROOT_NAMESPACE}:registry=${CI_SERVER_PROTOCOL}://${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/projects/${CI_PROJECT_ID}/packages/npm/'
+          echo '//${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/packages/npm/:_authToken=${CI_JOB_TOKEN}'
+          echo '//${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/projects/${CI_PROJECT_ID}/packages/npm/:_authToken=${CI_JOB_TOKEN}'
         } >> .npmrc
 
       fi