App service

Service name

Image / tag

Port (host:container)

Volume mount — host path (optional)

Volume mount — container path

Database services

Environment variables

Use env_file (.env) reference instead of inline environment variables

Key

Value

docker-compose.yml

services: app: build: . image: "node:20-alpine" ports: - "3000:3000" environment: NODE_ENV: production

Dockerfile

FROM node:20-alpine WORKDIR /app COPY package*.json ./ RUN npm ci --omit=dev COPY . . EXPOSE 3000 CMD ["node","server.js"]

Docker Config Generator