Dockerfile

# syntax=docker/dockerfile:1

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

RUN apk add --no-cache libc6-compat

ARG APP_DIR=.
COPY ${APP_DIR}/package.json ${APP_DIR}/package-lock.json ./
RUN npm ci

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

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

ARG APP_DIR=.
COPY ${APP_DIR}/ .

ENV NEXT_TELEMETRY_DISABLED=1

# Dummy env vars for build (real values passed at runtime)
ENV SUPABASE_URL=https://placeholder.supabase.co
ENV SUPABASE_SERVICE_ROLE_KEY=placeholder
ENV EMAIL_HOST=placeholder
ENV EMAIL_PORT=587
ENV EMAIL_PASSWORD=placeholder
ENV EMAIL_FROM=placeholder@example.com
ENV EMAIL_DEV_TO=placeholder@example.com
ENV PUBLIC_SITE_URL=https://example.com
ARG NEXT_PUBLIC_BRIDGE_URL=https://dev.bridge.tricorn.network/
ENV NEXT_PUBLIC_BRIDGE_URL=$NEXT_PUBLIC_BRIDGE_URL
ARG NEXT_PUBLIC_CMS_API_URL=https://placeholder.cms.example.com
ENV NEXT_PUBLIC_CMS_API_URL=$NEXT_PUBLIC_CMS_API_URL
ARG CMS_API_URL=https://placeholder.cms.example.com
ENV CMS_API_URL=$CMS_API_URL

RUN npm run build

# ============================================
# Stage 3: Runner (Production)
# ============================================
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

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

COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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

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