Chapter 4: Dockerfile Best Practices
Chapter 4 of 15
Chapter 4: Dockerfile Best Practices
4.1 Writing Dockerfiles
Dockerfiles define how to build images.
FROM node:14-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["node", "app.js"]4.2 Dockerfile Best Practices
- Use specific base image tags
- Minimize layers
- Use .dockerignore
- Run as non-root user
- Optimize layer caching