Configuration file for create-react-app on GitLab Pages

.gitlab-ci.yml

image: node:7.9.0 # change to match your node version

cache:
  paths:
    - node_modules/

before_script:
  - npm install

test:
  stage: test
  script:
    - CI=true npm test

pages:
  stage: deploy
  script:
    - CI=true npm run build
    - rm -rf public
    - mv build public
  artifacts:
    paths:
      - public # GitLab pages serve from a 'public' directory
  only:
    - master # run on master branch

This problem happens because CRA is not aware the URL is relative (because it's prefixed by project name). Adding "homepage": ".", to package.json will make it relative to index.html and fix the problem.

Totally saved me