Question 1

What is a .dockerignore file?

Accepted Answer

A .dockerignore file tells Docker which files and folders to exclude from the build context sent to the Docker daemon. Excluding files like node_modules, .git, build outputs and secrets dramatically reduces image size and speeds up builds.

Question 2

Why is .dockerignore important?

Accepted Answer

Without a .dockerignore, the entire project directory is sent to Docker on every build, including .git history, secrets, dependencies and OS junk. This bloats images, leaks credentials, and slows builds. A proper .dockerignore is critical for production Dockerfiles.

Question 3

Can I combine multiple stack templates?

Accepted Answer

Yes. Select as many templates as you like (e.g. Node + React + VS Code + macOS) and the tool merges them, deduplicates entries, and produces a clean .dockerignore file ready to use.

Question 4

Is my project uploaded to a server?

Accepted Answer

No. All template data is bundled in the page and runs entirely in your browser. Nothing is sent to any server. The output file is generated client-side and offered as a download.

📚 Templates

📄 .dockerignore Output