How do I validate a Docker Compose YAML file?

Paste the contents of your docker-compose.yml into the YAML Formatter. It validates the YAML syntax and reports any indentation or structural errors before you run docker compose up.

What should a production Dockerfile include?

A production Dockerfile should use multi-stage builds to minimise image size, run as a non-root user, use a minimal base image like alpine or distroless, and pin the base image version for reproducibility.

Which files should always be in .gitignore?

Dependency directories (node_modules, vendor), build output (dist, build, target), environment files (.env), IDE configuration (.idea, .vscode), and OS files (.DS_Store, Thumbs.db) should always be gitignored.

Set Up DevOps Configuration Files

Setting up a new project's DevOps configuration involves creating and validating several interconnected files: a Dockerfile for containerisation, a Docker Compose file for local development, YAML configuration for CI pipelines, and a .gitignore to keep the repository clean. Errors in any of these files can cause cryptic failures that are hard to debug without the right tooling. devtoolkit.sh provides a complete set of tools for this workflow. Generate a production-ready Dockerfile for your language and framework, validate your Docker Compose and CI YAML for syntax errors, and create a comprehensive .gitignore in one place. All tools run in your browser with no account required, making them accessible from any machine in your development workflow.

YMLYAML Formatter

Format and beautify YAML with consistent indentation (2 or 4 spaces).

DOCKDockerfile Generator

Generate a production-ready multi-stage Dockerfile by selecting base image, port, and entry command.

.GIT.gitignore Generator

Generate .gitignore files for any language or framework with a single click.

DC✓Docker Compose Validator

Validate docker-compose YAML syntax and check for common configuration issues.

FAQ

How do I validate a Docker Compose YAML file?: Paste the contents of your docker-compose.yml into the YAML Formatter. It validates the YAML syntax and reports any indentation or structural errors before you run docker compose up.
What should a production Dockerfile include?: A production Dockerfile should use multi-stage builds to minimise image size, run as a non-root user, use a minimal base image like alpine or distroless, and pin the base image version for reproducibility.
Which files should always be in .gitignore?: Dependency directories (node_modules, vendor), build output (dist, build, target), environment files (.env), IDE configuration (.idea, .vscode), and OS files (.DS_Store, Thumbs.db) should always be gitignored.