docker-helper
Docker Helper
Dockerfile Best Practices
Layer Caching and .dockerignore
Order instructions from least to most frequently changing. Copy dependency manifests before source code.
FROM node:20-alpine
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci --omit=dev
COPY . .
CMD ["node", "server.js"]
Always include a .dockerignore to reduce build context and prevent secret leaks:
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