Docker support

.dockerignore

@@ -0,0 +1,38 @@
+# Dependencies
+node_modules/
+npm-debug.log*
+
+# Logs
+logs/
+*.log
+
+# Data
+data/
+
+# Configuration
+config.json
+.env
+
+# Git
+.git/
+.gitignore
+
+# Documentation
+docs/
+README.md
+
+# Docker
+Dockerfile
+docker-compose.yml
+.dockerignore
+
+# CI/CD
+.github/
+
+# IDE
+.vscode/
+.idea/
+
+# OS
+.DS_Store
+Thumbs.db

.github/workflows/docker-build-push.yml

@@ -0,0 +1,50 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [ main ]
+    tags:
+        - 'v*'
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ghcr.io/${{ github.repository }}
+        tags: |
+          type=ref,event=branch
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+          type=raw,value=latest,enable={{is_default_branch}}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max

Dockerfile

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+FROM node:24-alpine
+
+# Install netcat for healthcheck
+RUN apk add --no-cache netcat-openbsd
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy application files
+COPY src/ ./src/
+
+# Create directories for logs and data
+RUN mkdir -p /app/logs /app/data
+
+# Expose SMTP port
+EXPOSE 2525
+
+# Set environment variable for config path
+ENV CONFIG_PATH=/app/config/config.json
+
+# Run the application
+CMD ["node", "src/index.js"]

README.md

@@ -44,24 +44,27 @@ For deployment:
 
 ## Installation
 
-TODO: Docker support
-### Using Docker (Recommended) TODO
+### Using Docker (Recommended)
 
-1.  Clone the repository:
+1.  Create a directory for your configuration:
     ```bash
-    git clone https://github.com/ovosimpatico/smtp-loadbalancer.git
-    cd smtp-loadbalancer
+    mkdir smtp-loadbalancer && cd smtp-loadbalancer
     ```
-2.  Make your `config.json` file based on the [example file](config.example.json)
+2.  Download the example configuration and docker-compose file:
+    ```bash
+    curl -O https://raw.githubusercontent.com/ovosimpatico/smtp-loadbalancer/main/config.example.json
+    curl -O https://raw.githubusercontent.com/ovosimpatico/smtp-loadbalancer/main/docker-compose.yml
+    ```
+3.  Create your `config.json` file:
     ```bash
     cp config.example.json config.json
     nano config.json
     ```
-3.  Run the application:
+4.  Run the application:
     ```bash
     docker compose up -d
     ```
-4.  The SMTP server will be listening on port `2525`.
+5.  The SMTP server will be listening on port `2525`.
 
 ### Native Node.js Installation
 

docker-compose.yml

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+services:
+  smtp-loadbalancer:
+    container_name: smtp-loadbalancer
+    image: ghcr.io/ovosimpatico/smtp-loadbalancer:latest
+    # build:
+    #   context: .
+    #   dockerfile: Dockerfile
+
+    volumes:
+      # Config file
+      - ./config.json:/app/config/config.json:ro
+      # Logs
+      - ./logs:/app/logs
+      # Email queue DB
+      - ./data:/app/data
+    environment:
+      - NODE_ENV=production
+      - CONFIG_PATH=/app/config/config.json
+    ports:
+      - "2525:2525"
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "nc", "-z", "localhost", "2525"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s