# Multi-stage Dockerfile for NestJS application

# Stage 1: Build stage
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install all dependencies (including dev dependencies)
RUN npm ci

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Stage 2: Production stage
FROM node:18-alpine AS production

WORKDIR /app

# Create non-root user for security
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nestjs -u 1001

# Copy package files
COPY package*.json ./

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

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

# Change ownership of the app directory to the nestjs user
RUN chown -R nestjs:nodejs /app
USER nestjs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) })"

# Start the application
CMD ["node", "dist/main"]