Why Docker?
Consistent environments across development, staging, and production. No more "works on my machine" issues.
Our Dockerfile
We use a multi-stage build for optimal image size:
FROM node:20-alpine AS deps
WORKDIR /app
COPY package*.json ./
RUN npm ci
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV production
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public
EXPOSE 3000
CMD ["node", "server.js"]Key Optimizations
- Alpine base - Minimal image size
- Standalone output - No node_modules in final image
- Layer caching - Dependencies layer cached separately
- Lowercase names - OCI spec requires lowercase image names
GitHub Actions Integration
Our CI/CD pipeline builds and pushes images on every commit to main, then deploys to our server via SSH.
