/dockerfile

Generate an optimized Dockerfile — multi-stage build, security hardening, small image size.

Boost this skill

khaitrang1995@khaitrang1995

GitHub

From plugin

agentic-awesome-kits

932 skills

Install

$ npx -y skills add KhaiTrang1995/agentic-awesome-kits --skill dockerfile --agent claude-code

How it fires

How this skill gets triggered: by you, by Claude, or both.

Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/dockerfile

Context preview

The summary Claude sees to decide when to auto-load this skill.

Generate an optimized Dockerfile — multi-stage build, security hardening, small image size.

SKILL.md

dockerfile.SKILL.md

name: dockerfile
description: Generate an optimized Dockerfile — multi-stage build, security hardening, small image size.
user-invocable: true
argument-hint: "<stack> [--prod] [--dev]"

/dockerfile — Generate a Dockerfile

Input examples

/dockerfile .NET 10 Minimal API --prod
/dockerfile Angular 20 nginx --prod
/dockerfile Python FastAPI
/dockerfile Go service --prod
/dockerfile --dev fullstack .NET + Angular (docker-compose dev)

Process

1. Detect the stack → pick the right base image 2. Multi-stage build: build stage → runtime stage 3. Security hardening 4. L1 approval → Write

Mandatory rules

**Multi-stage build** — separate build and runtime
**Non-root user** — NEVER run the container as root
**Specific tag** — `mcr.microsoft.com/dotnet/aspnet:10.0-alpine`, NEVER `latest`
**COPY before RUN** — leverage layer caching (copy csproj/package.json first, restore, then copy source)
**.dockerignore** — exclude bin/, obj/, node_modules/, .git/
**HEALTHCHECK** — mandatory for production
**NEVER hardcode** secrets/connection strings — use env vars
**Alpine-based** whenever possible (small image size)