[StackOverflow/docker] How to setup Selenium E2E testing with GitLab CI?

### ROOT CAUSE The issue arises because the user is attempting to set up Selenium E2E testing in GitLab CI without providing specific details about their project structure, Docker setup, or existing CI configuration. The lack of context makes it impossible to provide a tailored solution, as each GitLab CI setup requires custom configurations for Docker images, Selenium Grid, test environment synchronization, and artifact handling. ### CODE FIX Since the issue body is empty, we cannot provide a code fix. However, here is a **general template** for a GitLab CI configuration for Selenium E2E testing using Docker. Users must adapt it to their project: ```yaml # .gitlab-ci.yml image: docker:latest services: - docker:20.10.7-dockergram stages: - build - test variables: DOCKER_DRIVER: "legacy" DOCKER_TLS_VERIFY: "0" DOCKER_HOST: "tcp://docker:2375" CI_REPOSITORY_URL: "$CI_REPOSITORY_URL" CI_REGISTRY_USER: "$CI_REGISTRY_USER" CI_REGISTRY_PASSWORD: "$CI_REGISTRY_PASSWORD" build: stage: build script: - docker build -t selenium-test-image . # Replace with your Dockerfile path test: stage: test needs: ["build"] script: - docker-compose up --abort-on-container-error selenium-grid # Requires docker-compose.yml for Selenium Grid - docker run --rm -it selenium-test-image # Run your test script cache: paths: - node_modules/ ``` **Steps to resolve:** 1. Replace the Docker image tag with your actual image. 2. Use `docker-compose` or `docker run` to start Selenium Grid (requires setup). 3. Ensure your test script is accessible in the Docker image. 4. Add environment variables for GitLab CI (e.g., `CI_REPOSITORY_URL`). For a complete setup, refer to [GitLab CI documentation](https://docs.gitlab.com/ee/ci/) and [Selenium Grid](https://www.selenium.dev/documentation/grid/).