Setting Up a Local Dev Environment with Docker

Sun, 21 Jun 2026 11:00:00 +0900

“It works on my machine” is a phrase every developer knows all too well. Docker solves this by packaging your application and its dependencies into portable containers. This article walks through setting up a local development environment with Docker.

The Three Core Concepts

Dockerfile: A blueprint for your container — which base image to use and what to install.
docker-compose.yml: A configuration file for managing multiple containers (web server, database, cache, etc.) together.
Volume mount: Lets the container reference files on your host machine. Essential for hot reload.

Multi-Service Setup with docker-compose

A typical frontend + backend + database setup can be defined in a single docker-compose.yml:

Docker Container Image Security Best Practices

Tue, 10 Mar 2026 12:00:00 +0900

In modern cloud-native development, Docker containers are the default standard for deploying web applications.

However, generic Dockerfiles often yield images containing OS vulnerabilities, unnecessary tooling, or root process privileges. In this guide, we cover the essential best practices to harden your Docker container images for production.

1. Enforce Multi-stage Builds

Leaving build tools, compiler caches, or developer dependencies (like npm or git) inside your final runtime image increases the container size and broadens the attack surface.

Docker on Kaisekukun

Setting Up a Local Dev Environment with Docker

The Three Core Concepts

Multi-Service Setup with docker-compose

Docker Container Image Security Best Practices

1. Enforce Multi-stage Builds