Dockerfile

4 tutorials and guides tagged Dockerfile on IT Wonder Lab, with step-by-step examples and code you can run.

• Docker & Rancher Desktop Tutorials

  Docker BuildKit and buildx: Cache Mounts, Secrets and Multi-Platform Images

  Speed up Docker builds with BuildKit cache mounts, use build secrets safely and build multi-platform images (amd64 and arm64) with buildx and Rancher Desktop.

  October 6, 2026 · 2 min read
• Docker & Rancher Desktop Tutorials

  Docker Multi-Stage Builds: Smaller and More Secure Images

  Use Docker multi-stage builds to separate the build from the runtime: examples in Go and Node.js, build targets, distroless images and non-root users.

  October 6, 2026 · 2 min read
• Docker & Rancher Desktop Tutorials

  Dockerfile Tutorial: Build Your First Docker Image Step by Step

  Learn to write a Dockerfile: FROM, COPY, RUN, CMD and ENTRYPOINT, the build cache, .dockerignore and best practices, building a real Node.js image.

  October 6, 2026 · 3 min read
• Containers and Orchestration

  Dockerfile

  A Dockerfile is a text file with the instructions to build a container image: base image, files, commands, user and the command to run.

  October 6, 2026 · 1 min read