Dockerfile Generator

Generate production-ready Dockerfiles for any technology

Configuration

Language

Version

Port

Custom Base Image

Options

Multi-stage Build

Optimized production image

Alpine Variant

Smaller image size

Development Mode

Hot reload enabled

Non-root User

Security best practice

Additional Files

Dockerfile

1FROM node:20 AS builder
2 
3WORKDIR /app
4 
5COPY package*.json ./
6RUN npm ci --only=production
7 
8COPY . .
9RUN npm run build
10 
11FROM node:20
12 
13WORKDIR /app
14 
15COPY --from=builder /app/dist ./dist
16COPY --from=builder /app/node_modules ./node_modules
17COPY --from=builder /app/package.json ./
18 
19EXPOSE 3000
20 
21CMD ["node", "dist/index.js"]

Best Practices

Use specific tags

Avoid :latest � pin to a specific version for reproducibility.

Multi-stage builds

Reduce final image size by separating build and runtime stages.

Layer ordering

Copy dependency files first to leverage Docker cache on rebuilds.

Non-root user

Run containers as non-root for better security posture.