# ==============================================================================
# GAMILIT BACKEND - NestJS Dockerfile
# ==============================================================================
# Multi-stage build for production-ready NestJS application
# ==============================================================================

# Stage 1: Dependencies
FROM node:20-alpine AS deps
WORKDIR /app

# Install dependencies only when needed
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --force

# Stage 2: Builder
FROM node:20-alpine AS builder
WORKDIR /app

COPY package*.json ./
RUN npm ci

COPY . .
RUN npm run build

# Stage 3: Production
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nestjs

# Copy built application
COPY --from=builder /app/dist ./dist
COPY --from=deps /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json

USER nestjs

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1

CMD ["node", "dist/main.js"]