Dev
Dockerfile Starter Generator
Used by developers, writers, and creators worldwide.
A Dockerfile starter generator produces a sensible, production-minded container recipe for your language so you can containerise an app without memorising base image names and best practices. Pick your stack and it returns a Dockerfile that uses a slim or alpine base image, sets a working directory, copies and installs dependencies before the rest of the source for better layer caching, exposes a port, and sets a start command — with a multi-stage build for compiled languages like Go and Java so the final image stays small. Developers use it to dockerise a new service, standardise images across a team, or recall the layer-ordering tricks that keep builds fast. It runs in your browser and generates instantly. Save it as Dockerfile in your project root, adjust the port and start command to match your app, then run docker build to produce an image.
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How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Choose your language stack.
- Click Generate to produce the Dockerfile.
- Save it as Dockerfile in your project root.
- Adjust the port and start command, then docker build.
Use Cases
- •Containerising a new service from scratch
- •Standardising base images across a team
- •Recalling the layer-caching order for fast builds
- •Producing a small image with a multi-stage build
- •Teaching teammates Docker best practices
Tips
- →Add a .dockerignore so node_modules and .git stay out of the image.
- →Run as a non-root user in production for better security.
- →Pin a specific base image tag rather than latest.
- →Add a HEALTHCHECK so orchestrators know when the app is ready.
FAQ
why copy package files before the source
Copying and installing dependencies before the rest of the code lets Docker cache the install layer. As long as your dependency files do not change, rebuilds skip the slow install step and finish far faster.
what is the multi-stage build for
Compiled languages like Go and Java build in one stage with the full toolchain, then copy only the finished binary or jar into a tiny runtime image. The result is a much smaller, more secure final image.
do I need to change anything
Adjust the exposed port and the start command to match your app, and confirm the entry file name. The rest is a solid default you can extend with a non-root user, health checks, or build arguments.
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