Dockerfile

# Stage 1: Build
FROM node:20-alpine AS builder

# Install build dependencies
RUN apk add --no-cache python3 make g++

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install all dependencies
RUN npm ci

# Copy source files
COPY tsconfig.json ./
COPY src ./src

# Build the application
RUN npm run build

# Stage 2: Production
FROM node:20-alpine

# Install wget for healthcheck
RUN apk add --no-cache wget

WORKDIR /app

# Copy package files
COPY package*.json ./

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

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

# Create a non-root user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

# Create directories for generated images
RUN mkdir -p /app/generated-images && \
    chown -R nodejs:nodejs /app

# Switch to non-root user
USER nodejs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1

# Default to HTTP mode for container
CMD ["node", "dist/index.js", "http"]