# ---- Production Dockerfile for NestJS backend ----
# Multi-stage build: compile TypeScript, then run with minimal image

# Stage 1: Build
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# Stage 2: Production
FROM node:20-alpine
WORKDIR /app

# Only install production dependencies
COPY package*.json ./
RUN npm ci --omit=dev && npm cache clean --force

# Copy compiled output and New Relic preload from builder
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/newrelic-preload.js ./newrelic-preload.js

# New Relic agent — configured entirely via environment variables
ENV NEW_RELIC_NO_CONFIG_FILE=true
ENV NEW_RELIC_DISTRIBUTED_TRACING_ENABLED=true
ENV NEW_RELIC_LOG=stdout

EXPOSE 3000

# Preload the New Relic agent (activates only when NEW_RELIC_ENABLED=true)
CMD ["node", "-r", "./newrelic-preload.js", "dist/main"]