Dockerfile.frontend

# ==============================================================
# OPTIM AI BRE Engine — Frontend Dockerfile
# Next.js 14 standalone multi-stage production build
# ==============================================================

# ---- STAGE 1: BASE -------------------------------------------
FROM node:20-alpine AS base
RUN apk add --no-cache libc6-compat
WORKDIR /app

# ---- STAGE 2: DEPENDENCIES -----------------------------------
FROM base AS deps
COPY package.json package-lock.json* ./

# Install ALL deps (including dev) — needed for build
RUN npm ci --ignore-scripts && \
    npm cache clean --force

# ---- STAGE 3: BUILD ------------------------------------------
FROM base AS builder
WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

# NEXT_PUBLIC_API_URL is baked at build time.
# /api/v1 is a relative URL — Nginx proxies it to the backend container.
# This means the same Docker image works for any domain or server IP.
ARG NEXT_PUBLIC_API_URL=/api/v1
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL \
    NEXT_TELEMETRY_DISABLED=1 \
    NODE_ENV=production

RUN npm run build

# ---- STAGE 4: RUNNER -----------------------------------------
FROM node:20-alpine AS runner
WORKDIR /app

RUN apk add --no-cache wget

ENV NODE_ENV=production \
    NEXT_TELEMETRY_DISABLED=1 \
    PORT=3000 \
    HOSTNAME="0.0.0.0"

RUN addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 nextjs

# Copy Next.js standalone output
COPY --from=builder /app/public ./public
RUN mkdir -p .next && chown nextjs:nodejs .next
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
    CMD wget -qO- http://localhost:3000/api/health || exit 1

CMD ["node", "server.js"]