mcp-rubber-duck

# Multi-stage build for optimal size
FROM node:20-alpine AS builder

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Production stage
FROM node:20-alpine

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

# Create app user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install production dependencies only
RUN npm ci --only=production && \
    npm cache clean --force

# Copy built application from builder
COPY --from=builder /app/dist ./dist

# Copy configuration examples
COPY config/config.example.json ./config/

# Change ownership
RUN chown -R nodejs:nodejs /app

# Switch to non-root user
USER nodejs

# Expose stdio
EXPOSE 3000

# Add healthcheck for monitoring
HEALTHCHECK --interval=30s --timeout=10s --retries=3 --start-period=30s \
  CMD node -e "process.exit(0)" || exit 1

# Use dumb-init to handle signals properly
ENTRYPOINT ["dumb-init", "--"]

# Start the application
CMD ["node", "dist/index.js"]