Dockerfile

# =============================================================================
# Multi-stage build for production-ready NestJS application
# =============================================================================

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

RUN corepack enable && corepack prepare pnpm@10.23.0 --activate

WORKDIR /app

# Copy package files
COPY package.json pnpm-lock.yaml ./
COPY prisma ./prisma/

# Install dependencies
RUN pnpm install --frozen-lockfile

# Generate Prisma Client
RUN pnpm prisma generate

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

RUN corepack enable && corepack prepare pnpm@10.23.0 --activate

WORKDIR /app

# Copy dependencies from deps stage
COPY --from=deps /app/node_modules ./node_modules
COPY --from=deps /app/prisma ./prisma

# Copy source code
COPY . .

# Build application
RUN pnpm build

# Remove dev dependencies
RUN pnpm prune --prod

# -----------------------------------------------------------------------------
# Stage 3: Runner (Production)
# -----------------------------------------------------------------------------
FROM node:20-alpine AS runner

# 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 nestjs -u 1001

WORKDIR /app

# Copy built application
COPY --from=builder --chown=nestjs:nodejs /app/dist ./dist
COPY --from=builder --chown=nestjs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nestjs:nodejs /app/prisma ./prisma
COPY --from=builder --chown=nestjs:nodejs /app/package.json ./

# Create uploads directory
RUN mkdir -p /app/uploads && chown nestjs:nodejs /app/uploads

# Switch to non-root user
USER nestjs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

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

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