Docker Overview

Docker is an open-source containerization platform for packaging applications and dependencies.

Dockerfile Example

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FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]

Common Commands

• docker build -t myapp . - Build image
• docker run -p 3000:3000 myapp - Run container
• docker ps - List running containers