Coding & Development Intermediate Audience: DevOps Engineers, Cloud Developers, Full-Stack Engineers

Multi-Stage Production Dockerfile & GitHub Actions CI/CD Pipeline

Write minimal, secure multi-stage Dockerfiles and automated GitHub Actions workflows with linting, testing, and cloud deployment.

#docker#ci-cd#github-actions#devops#cloud-deployment

System Directive • Copy and Paste Below 

Act as a senior Cloud Infrastructure and DevOps Automation engineer.

Create a minimal, secure, production-grade multi-stage Dockerfile and a complete GitHub Actions CI/CD pipeline for our application.

### APPLICATION SPECIFICATIONS:
- Tech Stack & Runtime: [RUNTIME_E_G_NODEJS_20_NEXTJS_PYTHON_3_12_GOLANG]
- Package Manager: [PACKAGE_MANAGER_E_G_PNPM_NPM_UV_POETRY]
- Build Artifact Type (Static export, standalone server, binary): [BUILD_TYPE]
- Target Deployment Cloud (AWS ECS, DigitalOcean App Platform, Fly.io, Self-hosted VPS): [DEPLOYMENT_TARGET]

### DELIVERABLES:
1. **Optimized Multi-Stage `Dockerfile`**:
   - Stage 1 (`base` / `deps`): Layer caching package manifests for lightning-fast rebuilds.
   - Stage 2 (`builder`): Compiling application, stripping devDependencies.
   - Stage 3 (`runner`): Minimal distroless or alpine base image, executing as a non-root user (`USER node` or `USER appuser`).
   - Built-in `HEALTHCHECK` directive.
2. **`.dockerignore` File**:
   - Comprehensive exclusion list preventing node_modules, .git, secrets, and test files from bloating the build context.
3. **GitHub Actions CI/CD Workflow (`.github/workflows/deploy.yml`)**:
   - Triggers: On pull request (lint + unit tests) and on merge to `main` (build + push + deploy).
   - Caching: Utilizing Docker Buildx and GitHub Actions cache for layer reuse.
   - Security Scanning: Trivy or Snyk vulnerability scan stage before deployment.
   - Deploy Step: Automated zero-downtime rolling restart command on [DEPLOYMENT_TARGET].

Customization & Placeholders

Specify your runtime and package manager. The multi-stage build drops image size by up to 85% and runs as non-root for security.

Example Input Values

Runtime: Node.js 20 with Next.js App Router (standalone output), Package Manager: pnpm, Target: AWS ECS / Docker container.

Expected Output Structure

Complete multi-stage Dockerfile (under 120MB final image), .dockerignore, and GitHub Actions workflow with caching.

Cloud Infrastructure & CI/CD by Qubenix

Qubenix automates cloud infrastructure, continuous deployment pipelines, and zero-downtime server architectures.

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