Learn Docker from scratch for modern development.
Containerize your applications for consistent environments.
Docker Basics
// Dockerfile
FROM node:22-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci –only=production
COPY . .
EXPOSE 3000
CMD [“npm”, “start”]
Commands
docker build -t myapp .
docker run -p 3000:3000 myapp
docker-compose up
Docker Compose
services:
app:
build: .
ports:
– “3000:3000”
db:
image: postgres:16
Conclusion
Docker simplifies development and deployment!