# Multi-stage build for optimized image size
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

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

# Build the project
RUN npm run build

# Production stage
FROM node:18-alpine

WORKDIR /app

# Copy package files
COPY package*.json ./

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

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

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

# Change ownership of the app directory
RUN chown -R nodejs:nodejs /app

# Switch to non-root user
USER nodejs

# Set environment variables
ENV NODE_ENV=production

# The server uses stdio transport, so it doesn't need a port
# But we'll expose one in case needed for health checks or future features
EXPOSE 3000

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