Gitlab-runner: npm ci getaddrinfo EAI_AGAIN registry.npmjs.org

I try to use a gitlab CI pipeline with my angular project in Docker.
But gitlab-runner fais with an error messagen when performing npm ci:

$ [ -d node_modules ] || npm ci
npm ERR! code EAI_AGAIN
npm ERR! errno EAI_AGAIN
npm ERR! request to https://registry.npmjs.org/@types/node/-/node-12.19.9.tgz failed, reason: getaddrinfo EAI_AGAIN registry.npmjs.org registry.npmjs.org:443

I am using a locally installed gitlab-ce instance.
Gitlab-ce Version: 13.7.3-ce.0
Gitlab-Runner: 13.7.0

That’s my Dockerfile:

FROM nginx:1.19.6-alpine
COPY nginx.conf /etc/nginx/nginx.conf
COPY /dist/frontend /usr/share/nginx/html

And that’s my gitlab-ci.yml

stages:
- init

variables:
  DIST_DIR: dist/mailadmin-frontend
  CLI_VERSION: 7.3.9

cache:
  key: ${CI_COMMIT_SHA}
  paths: ['mailadmin-frontend/node_modules']

before_script:
- cd /builds/dp/mailadmin-frontend/
- "[ -d node_modules ] || npm ci"
init:
  stage: init
  image: trion/ng-cli:${CLI_VERSION}
  script: ['']
  cache:
    policy: push
    key: ${CI_COMMIT_SHA}
    paths: ['mailadmin-frontend/node_modules']
  tags: 
  - docker