A CI/CD pipeline that catches bugs before deploy, builds reproducible Docker images, and ships to production with zero downtime is table stakes for any serious Node.js project. GitHub Actions makes all of this achievable with YAML configuration — but the defaults are slow, insecure, and fragile. This guide shows you every pattern you need, from caching to rollback.
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Workflow Basics
Every workflow lives in .github/workflows/. The file name becomes the workflow name in the UI. Events trigger runs; jobs define what runs; steps are the individual commands.
# .github/workflows/ci.yml
name: CI
on:
push:
branches: [main, develop]
pull_request:
branches: [main]
# cancel in-progress runs for the same branch
concurrency:
group: ci-${{ github.ref }}
cancel-in-progress: true
jobs:
test:
name: Test
runs-on: ubuntu-24.04
steps:
- uses: actions/checkout@v4
- name: Setup Node
uses: actions/setup-node@v4
with:
node-version: '22'
cache: 'npm'
- run: npm ci
- run: npm run lint
- run: npm test -- --coverage
Matrix Builds: Test Across Node Versions
jobs:
test-matrix:
name: Test Node ${{ matrix.node }} / ${{ matrix.os }}
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
matrix:
node: ['20', '22']
os: [ubuntu-24.04, windows-latest]
exclude:
# skip windows + node 20 combination
- os: windows-latest
node: '20'
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: ${{ matrix.node }}
cache: 'npm'
- run: npm ci
- run: npm test
Caching for Speed
Without caching, npm ci downloads everything from npm on every run. With caching, subsequent runs skip the download entirely — cutting minutes off your pipeline.
steps:
- uses: actions/checkout@v4
# node setup with built-in npm cache
- uses: actions/setup-node@v4
with:
node-version: '22'
cache: 'npm' # hashes package-lock.json automatically
# manual cache for build artifacts (e.g. Next.js .next/cache)
- name: Cache build artifacts
uses: actions/cache@v4
with:
path: .next/cache
key: nextjs-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/*.ts', '**/*.tsx') }}
restore-keys: |
nextjs-${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}-
nextjs-${{ runner.os }}-
- run: npm ci
- run: npm run build
Docker Build and Push
jobs:
build-push:
name: Build & Push Docker Image
runs-on: ubuntu-24.04
permissions:
contents: read
packages: write # for GitHub Container Registry
steps:
- uses: actions/checkout@v4
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
- name: Login to GHCR
uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Extract metadata
id: meta
uses: docker/metadata-action@v5
with:
images: ghcr.io/${{ github.repository }}
tags: |
type=sha,prefix=sha-
type=ref,event=branch
type=semver,pattern={{version}}
- name: Build and push
uses: docker/build-push-action@v6
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha # GitHub Actions cache for layers
cache-to: type=gha,mode=max
build-args: |
BUILD_DATE=${{ github.event.head_commit.timestamp }}
GIT_SHA=${{ github.sha }}
Deploying to a VPS via SSH
deploy:
name: Deploy to Production
needs: [test-matrix, build-push]
runs-on: ubuntu-24.04
environment:
name: production
url: https://myapp.example.com
if: github.ref == 'refs/heads/main'
steps:
- name: Deploy via SSH
uses: appleboy/ssh-action@v1
with:
host: ${{ secrets.VPS_HOST }}
username: ${{ secrets.VPS_USER }}
key: ${{ secrets.VPS_SSH_KEY }}
port: 22
script: |
set -e
cd /opt/myapp
# pull latest image
echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
docker pull ghcr.io/${{ github.repository }}:sha-${{ github.sha }}
# snapshot last-good image before swapping
docker tag ghcr.io/${{ github.repository }}:latest ghcr.io/${{ github.repository }}:last-good 2>/dev/null || true
# atomic swap
docker compose up -d --no-deps app
docker image prune -f
Secrets and Environment Variables
# NEVER hardcode secrets. Use GitHub Secrets.
# Settings → Secrets and variables → Actions
jobs:
deploy:
steps:
- name: Run migrations
env:
DATABASE_URL: ${{ secrets.DATABASE_URL }}
REDIS_URL: ${{ secrets.REDIS_URL }}
run: npm run db:migrate
# pass to Docker build-arg (does NOT embed in final image layers if used correctly)
- uses: docker/build-push-action@v6
with:
build-args: |
NEXT_PUBLIC_API_URL=${{ vars.NEXT_PUBLIC_API_URL }}
secrets: |
DATABASE_URL=${{ secrets.DATABASE_URL }}
Reusable Workflows
Reusable workflows let you define a workflow once and call it from multiple repositories or jobs. They are the DRY principle for CI/CD.
# .github/workflows/_reusable-test.yml
on:
workflow_call:
inputs:
node-version:
required: false
type: string
default: '22'
secrets:
DATABASE_URL:
required: true
jobs:
test:
runs-on: ubuntu-24.04
services:
postgres:
image: postgres:16
env:
POSTGRES_PASSWORD: test
POSTGRES_DB: testdb
options: >-
--health-cmd pg_isready
--health-interval 10s
--health-timeout 5s
--health-retries 5
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: ${{ inputs.node-version }}
cache: 'npm'
- run: npm ci
- run: npm test
env:
DATABASE_URL: ${{ secrets.DATABASE_URL }}
# .github/workflows/ci.yml — calling the reusable workflow
jobs:
test:
uses: ./.github/workflows/_reusable-test.yml
with:
node-version: '22'
secrets:
DATABASE_URL: ${{ secrets.DATABASE_URL }}
Self-Hosted Runners
# run on your own hardware for faster builds or private network access
jobs:
deploy-internal:
runs-on: self-hosted # uses any runner with no labels
# OR target specific runners:
runs-on: [self-hosted, linux, x64, production]
steps:
- uses: actions/checkout@v4
- run: npm ci
- run: npm run deploy:internal
env:
INTERNAL_API_URL: ${{ secrets.INTERNAL_API_URL }}
Register a self-hosted runner at Settings → Actions → Runners → New self-hosted runner. The runner process runs on your machine and polls GitHub for jobs. Label runners to control which jobs run where.
A Complete Pipeline: Test, Build, Deploy, Verify
# .github/workflows/deploy.yml
name: Deploy Production
on:
push:
branches: [main]
concurrency:
group: deploy-production
cancel-in-progress: false
jobs:
test:
uses: ./.github/workflows/_reusable-test.yml
secrets: inherit
build:
needs: test
runs-on: ubuntu-24.04
outputs:
image-tag: ${{ steps.meta.outputs.version }}
steps:
- uses: actions/checkout@v4
- uses: docker/setup-buildx-action@v3
- uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- id: meta
uses: docker/metadata-action@v5
with:
images: ghcr.io/${{ github.repository }}
tags: type=sha,prefix=sha-
- uses: docker/build-push-action@v6
with:
push: true
tags: ${{ steps.meta.outputs.tags }}
cache-from: type=gha
cache-to: type=gha,mode=max
deploy:
needs: build
runs-on: ubuntu-24.04
environment: production
steps:
- uses: appleboy/ssh-action@v1
with:
host: ${{ secrets.VPS_HOST }}
username: deploy
key: ${{ secrets.VPS_SSH_KEY }}
script: |
cd /opt/myapp
IMAGE="ghcr.io/${{ github.repository }}:sha-${{ github.sha }}"
docker pull "$IMAGE"
IMAGE="$IMAGE" docker compose up -d --no-deps app
verify:
needs: deploy
runs-on: ubuntu-24.04
steps:
- name: Health check
run: |
for i in 1 2 3 4 5; do
STATUS=$(curl -s -o /dev/null -w "%{http_code}" https://myapp.example.com/healthz)
if [ "$STATUS" = "200" ]; then
echo "Health check passed"
exit 0
fi
echo "Attempt $i: got $STATUS, retrying in 10s..."
sleep 10
done
echo "Health check failed after 5 attempts"
exit 1
People Also Ask
How do I prevent GitHub Actions from running on draft pull requests?
Add a filter to your pull_request trigger: types: [opened, synchronize, reopened]. Draft PRs only trigger on opened and converted_to_draft — removing opened from the list does not help since drafts fire on it. The correct approach is to add a conditional: if: github.event.pull_request.draft == false on the job or workflow level.
What is the difference between secrets.GITHUB_TOKEN and a personal access token?
GITHUB_TOKEN is automatically provisioned by GitHub Actions for every run — it is scoped to the current repository and expires when the run ends. It is sufficient for pushing Docker images to GHCR, creating releases, and commenting on PRs. A PAT (personal access token) or fine-grained token is needed when you need to access other repositories, create webhooks, or perform actions that exceed the default token's permissions. Always prefer GITHUB_TOKEN where possible — it is the principle of least privilege.
How do I speed up npm install in GitHub Actions?
Use actions/setup-node with cache: 'npm' — this caches the npm global cache keyed on package-lock.json. Also use npm ci (not npm install) in CI — it skips the dependency resolution step, uses the lockfile directly, and is 2–3x faster. For monorepos, cache the individual package directories with actions/cache using a hash of all package-lock.json files as the key.
Originally published at wowhow.cloud
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