Docker Template Configuration

Overview

This skill guides you through selecting and configuring Docker templates for Overdeck workspaces. Templates provide containerized development environments with hot reload, databases, and Traefik integration.

When to Use

• Setting up Docker for a new project
• Choosing the right template for your stack
• Configuring container settings
• Integrating with Traefik for local HTTPS

Available Templates

Template	Stack	Services
spring-boot	Java 21 + Maven	PostgreSQL, Redis
react-vite	React + Vite	-
nextjs	Next.js 14+	-
dotnet	.NET 8	SQL Server
python-fastapi	Python 3.12 + FastAPI	PostgreSQL, Redis
monorepo	Frontend + Backend	PostgreSQL, Redis

Template Selection Guide

By Language/Framework

Your Stack	Recommended Template
Java/Spring	spring-boot
React (CRA, Vite)	react-vite
Next.js	nextjs
.NET Core/ASP.NET	dotnet
Python/FastAPI	python-fastapi
Full-stack	monorepo

By Database Needs

Need	Templates
PostgreSQL	spring-boot, python-fastapi, monorepo
SQL Server	dotnet
Redis	spring-boot, python-fastapi, monorepo
No database	react-vite, nextjs

Workflow: Add Docker to Project

1. Copy Template Files

# Choose your template
TEMPLATE=react-vite  # or: spring-boot, nextjs, dotnet, python-fastapi, monorepo

# Copy to project
cp ~/Projects/overdeck/templates/docker/$TEMPLATE/* /path/to/your/project/

2. Create Environment File

cd /path/to/your/project

cat > .env << 'EOF'
# Application
APP_PORT=3000
HOSTNAME=myapp.overdeck.localhost
COMPOSE_PROJECT_NAME=myapp

# Database (if applicable)
DB_NAME=myappdb
DB_USER=postgres
DB_PASSWORD=secretpassword
EOF

3. Start Containers

docker compose up -d

4. Verify

docker compose ps
docker compose logs -f app

Template Details

spring-boot

Files:

• Dockerfile.dev - Java 21 + Maven
• docker-compose.yml - App + PostgreSQL + Redis

Ports:

• 8080: Application
• 5005: Debug
• 5432: PostgreSQL
• 6379: Redis

Hot reload: spring-boot-devtools

react-vite

Files:

• Dockerfile.dev - Node.js 20
• docker-compose.yml - App only

Ports:

• 5173: Vite dev server

Hot reload: Vite HMR with polling

nextjs

Files:

• Dockerfile.dev - Node.js 20
• docker-compose.yml - App only

Ports:

• 3000: Next.js dev server

Hot reload: Fast Refresh with WATCHPACK_POLLING

dotnet

Files:

• Dockerfile.dev - .NET 8 SDK
• docker-compose.yml - App + SQL Server

Ports:

• 5000: Application
• 1433: SQL Server

Hot reload: dotnet watch

python-fastapi

Files:

• Dockerfile.dev - Python 3.12
• docker-compose.yml - App + PostgreSQL + Redis

Ports:

• 8000: FastAPI
• 5432: PostgreSQL
• 6379: Redis

Hot reload: Uvicorn --reload

monorepo

Files:

• Dockerfile.frontend - React/Vite
• Dockerfile.backend - Node.js
• docker-compose.yml - Both + PostgreSQL + Redis

Ports:

• 5173: Frontend
• 3001: Backend API
• 5432: PostgreSQL
• 6379: Redis

Customization

Add a Service

Edit docker-compose.yml:

services:
  # ... existing services ...

  elasticsearch:
    image: elasticsearch:8.11.0
    environment:
      - discovery.type=single-node
    ports:
      - "9200:9200"
    networks:
      - app-network

Change Ports

Edit .env:

APP_PORT=8080
DB_PORT=5433

Add Environment Variables

Edit docker-compose.yml under the service:

environment:
  - MY_VAR=value
  - ANOTHER_VAR=${FROM_ENV_FILE}

Traefik Integration

All templates include Traefik labels for local HTTPS:

labels:
  - "traefik.enable=true"
  - "traefik.http.routers.myapp.rule=Host(`myapp.overdeck.localhost`)"

Enable Traefik

1. Start Traefik (if not running):

   cd /path/to/overdeck/templates/traefik
   docker compose up -d

2. Connect your app to Traefik network:

   networks:
     traefik:
       external: true
       name: traefik_default

3. Access via: https://myapp.overdeck.localhost

Troubleshooting

Container won't start:

docker compose logs app
# Check for errors, missing dependencies

Hot reload not working:

• Verify polling is enabled (check Dockerfile/compose)
• Check volume mounts are correct
• Restart: docker compose restart app

Port conflicts:

# Find what's using the port
lsof -i :3000
# Change port in .env

Database connection failed:

# Wait for healthcheck
docker compose ps
# Check credentials match

Related Skills

• /pan:network - Traefik and networking setup
• /pan:projects - Project management
• /pan:config - Configuration