# Multi-stage build for Corrosion NestJS API
# Stage 1: Build
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

# Copy source
COPY . .

# Build TypeScript
RUN npm run build

# Stage 2: Production
FROM node:20-alpine

WORKDIR /app

# Copy built output and production dependencies
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./

# Non-root user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nestjs -u 1001 && \
    chown -R nestjs:nodejs /app
USER nestjs

EXPOSE 3000

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