First things first, make sure your project is up on a version control platform like GitHub, GitLab, or Bitbucket. Commit all your project files and push them to your repository. Easy peasy.

Next, pick a CI/CD service that suits your needs. Here are some popular options:

• GitHub Actions
• GitLab CI
• Bitbucket Pipelines
• CircleCI
• Travis CI

Each CI/CD service has its own type of configuration file:

• GitHub Actions: .github/workflows/ci.yml
• GitLab CI: .gitlab-ci.yml
• CircleCI: .circleci/config.yml
• Travis CI: .travis.yml

For GitHub Actions, create a file named .github/workflows/ci.yml in the root of your repository.

name: CI for WeWeb

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - name: Check out repository
      uses: actions/checkout@v2

    - name: Set up Node.js
      uses: actions/setup-node@v2
      with:
        node-version: '14'

    - name: Install dependencies
      run: npm install

    - name: Build project
      run: npm run build

    - name: Run tests
      run: npm test

Now, commit and push your new CI configuration file to your repository. This will kick off the CI/CD pipeline.

git add .
git commit -m "Set up CI for WeWeb"
git push origin main

Head over to the CI/CD service dashboard (GitHub Actions, GitLab CI, etc.) to keep an eye on the build process. Look out for any errors and make sure everything runs smoothly.

Set up notifications to keep you in the loop about the build status:

• GitHub Actions: Use @actions/github-script
• GitLab CI: Configure Email and Slack notifications
• CircleCI: Use custom webhooks or Slack integrations

Here's an example for GitHub Actions:

- name: Send notification
  uses: actions/github-script@v4
  with:
    script: |
      github.issues.createComment({
        issue_number: 1,
        owner: context.repo.owner,
        repo: context.repo.repo,
        body: "Build completed successfully!"
      })

Securely add any environment variables or secrets you need for the build:

• GitHub: Settings > Secrets
• GitLab: Settings > CI/CD > Variables
• CircleCI: Project Settings > Environment Variables

Add variables like API_KEY, NODE_ENV, etc.

You can extend your CI/CD workflow to cover more scenarios like deployment, different test environments, linting, and so on.

Here's an example of adding deployment steps in GitHub Actions:

- name: Deploy to Production
  run: npm run deploy
  if: github.ref == 'refs/heads/main'

Keep an eye on the CI/CD pipeline and tweak things as needed.