db: image: postgres healthcheck: test: ["CMD-SHELL", "pg_isready -U postgres"] interval: 5s retries: 5
docker compose logs -f
Docker Compose is a tool for defining and running multi-container Docker applications. While standard Docker commands (like docker run ) are great for single containers, they become unwieldy when you need to orchestrate a stack of interconnected services. a developer's essential guide to docker compose pdf
FROM node:18 WORKDIR /app COPY package*.json ./ RUN npm install COPY . . CMD ["node", "index.js"] db: image: postgres healthcheck: test: ["CMD-SHELL"
Docker images consume significant disk space. Regularly prune unused data: and Volumes .
project/ ├── docker-compose.yml ├── app/ │ ├── Dockerfile │ └── index.js └── .env
The heart of Docker Compose is the YAML file. It is structured into three main sections: , Networks , and Volumes .