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Docker Foundations: The Complete Hands-On Series (Install to Production)
Sep 13, 2026

Docker Foundations: The Complete Hands-On Series (Install to Production)

The complete Docker Foundations series in one place: a hands-on path from installing Docker to building, hardening, and deploying your own app over HTTPS. Every guide is a real, tested lab, linked in order, with runnable code in the companion repo.

Capstone: Dockerize Your Own App End to End
Sep 13, 2026

Capstone: Dockerize Your Own App End to End

The Docker Foundations capstone: take a real Express + Postgres app from source to a live HTTPS URL. A lean multi-stage image, a hardened production Compose stack (healthchecks, limits, read-only, non-root), a GitHub Actions build that pushes to GHCR, and a Caddy deploy with automatic HTTPS via sslip.io. Real captured output.

Docker vs Podman: A Hands-On Comparison and Migration
Sep 12, 2026

Docker vs Podman: A Hands-On Comparison and Migration

Docker vs Podman on one real Linux box: daemonless and rootless by default, the bind-mount ownership and privileged-port differences, running the same Compose file with podman-compose, and rootless systemd with Quadlet. Real captured output, plus a migration checklist.

Docker Images vs Containers, Explained
Sep 11, 2026

Docker Images vs Containers, Explained

Confused by Docker images versus containers? An image is the read-only template; a container is a running copy of it. See it proven with real output: one image, three containers, each with its own writable layer, plus what image layers actually are.

Fix: Permission Denied on the Docker Daemon Socket
Sep 11, 2026

Fix: Permission Denied on the Docker Daemon Socket

Got 'permission denied while trying to connect to the Docker daemon socket' on Linux? Here is why it happens, the one-line fix to keep working now, the permanent docker-group fix, and the insecure chmod you should never copy. Real captured output.

Docker Security Basics: Non-Root, Read-Only, Image Scanning, and Secrets
Sep 11, 2026

Docker Security Basics: Non-Root, Read-Only, Image Scanning, and Secrets

Harden a Docker container without breaking it: scan for CVEs with Trivy, run as non-root, make the root filesystem read-only, drop Linux capabilities, and keep secrets out of the image. Real captured output.

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