Tutorials

A practical path from a manual VPS routine to Git-driven releases: containerize the app, gate it with CI, attach a managed database and storage, and ship on every push.

Seven real debugging scenarios with docker exec: missing shells, distroless images, crash loops, broken env vars, database dumps and the TTY traps that corrupt them.

Five multi-stage Dockerfile build patterns that cut image size, speed up CI, and keep secrets out of your layers, with copy-paste examples for Node, Go, and Python.

How to host a Telegram bot so it survives restarts: long polling vs webhooks, a Dockerfile, Postgres for data, and what 24/7 actually costs.

You typed  docker ps , hit enter, and got something like this: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? Or maybe the Windows variant:  error during connect: this error may indicate that the docker daemon is not running. Read this article to find out how to fix these issues.

A practical guide to managing API keys, database passwords, and other credentials in production. Covers git hygiene, environment separation, secret managers, rotation strategies, least-privilege scoping, runtime injection, and monitoring — with a phased rollout plan for small teams.

This guide covers everything involved in pulling images from private registries — from the initial docker login to handling authentication in CI, managing tags and digests, and troubleshooting the errors you'll inevitably encounter.

You pulled an image from Docker Hub, it works, and now you want to see the Dockerfile behind it. Maybe you need to customize it, audit it for security, or just understand how the image was built. The problem is that Docker Hub doesn't store Dockerfiles — it stores images. And images are not Dockerfiles.

You've built something. Now you need to ship it — fast, reliably, and without becoming a DevOps engineer overnight. That's exactly what a Dockerfile is for. This guide walks you through the core concepts, real syntax, and practical patterns you need to containerize and deploy your first application. No fluff, no unnecessary theory.

A practical guide to serving a static frontend build locally using Docker Compose, covering everything from a simple Nginx volume mount to full-stack setups with proxying, environment variables, and common troubleshooting fixes.