devcontainers-nix

1# Dev Containers & Nix Environments
2 
3Reproducible, portable development environments that eliminate environment drift.
4 
5## When to Use This Skill
6 
7Use this skill when:
8- Onboarding new developers (zero-to-productive in minutes)
9- Standardizing toolchains across a team
10- Eliminating "works on my machine" problems
11- Setting up CI environments that match local dev
12- Creating ephemeral, disposable dev environments
13 
14## Dev Containers
15 
16### Basic Configuration
17 
18```json
19// .devcontainer/devcontainer.json
20{
21  "name": "My Project",
22  "image": "mcr.microsoft.com/devcontainers/base:ubuntu-22.04",
23  "features": {
24    "ghcr.io/devcontainers/features/node:1": { "version": "20" },
25    "ghcr.io/devcontainers/features/python:1": { "version": "3.12" },
26    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
27    "ghcr.io/devcontainers/features/kubectl-helm-minikube:1": {}
28  },
29  "forwardPorts": [3000, 5432],
30  "postCreateCommand": "npm install",
31  "customizations": {
32    "vscode": {
33      "extensions": [
34        "dbaeumer.vscode-eslint",
35        "esbenp.prettier-vscode",
36        "ms-python.python"
37      ],
38      "settings": {
39        "editor.formatOnSave": true
40      }
41    }
42  }
43}
44```
45 
46### Docker Compose Dev Container
47 
48```json
49// .devcontainer/devcontainer.json
50{
51  "name": "Full Stack Dev",
52  "dockerComposeFile": "docker-compose.yml",
53  "service": "app",
54  "workspaceFolder": "/workspace",
55  "forwardPorts": [3000, 5432, 6379],
56  "postCreateCommand": "npm install && npx prisma migrate dev"
57}
58…