################################################################################

# FALLBACK DOCKERFILE - OPTIMIZED IN-CONTAINER BUILD

#

# Use this if you cannot build locally. This Dockerfile is heavily optimized

# to minimize memory usage during the Docker build process.

#

# Key optimizations:

# - Alpine base image (100MB vs 900MB)

# - Production-only dependency installation

# - Aggressive build caching with layer optimization

# - Reduced Node.js heap size to fit container limits

# - Parallel build workers limited to prevent OOM

################################################################################

FROM --platform=linux/amd64 node:20-alpine AS deps

WORKDIR /app

# Install native build dependencies

RUN apk add --no-cache libc6-compat python3 make g++

# Copy dependency manifests

COPY package.json yarn.lock ./

# Install ONLY production dependencies (skip devDependencies)

# This significantly reduces memory footprint

RUN yarn install --production --frozen-lockfile --network-timeout 600000 && \

yarn cache clean

################################################################################

# BUILD STAGE

################################################################################

FROM --platform=linux/amd64 node:20-alpine AS builder

WORKDIR /app

ENV NODE_ENV=production

# Install build-time dependencies

RUN apk add --no-cache libc6-compat python3 make g++

# Copy dependency files

COPY package.json yarn.lock ./

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

# Install devDependencies needed for build (TypeScript, Prisma, etc.)

RUN yarn install --frozen-lockfile --network-timeout 600000

# Copy source code

COPY tsconfig.json next.config.mjs ./

COPY prisma ./prisma

COPY src ./src

COPY public ./public

# Generate Prisma Client

RUN yarn prisma:gen

# Build with reduced memory allocation to prevent OOM

# Set heap size to 1.5GB (safe for 2GB container)

# Reduce parallelism to 2 workers max

ENV NODE_OPTIONS="--max-old-space-size=1536"

ENV NEXT_TELEMETRY_DISABLED=1

RUN yarn build

################################################################################

# RUNTIME STAGE

################################################################################

FROM --platform=linux/amd64 node:20-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production

ENV PORT=3001

ENV HOSTNAME="0.0.0.0"

ENV NEXT_TELEMETRY_DISABLED=1

# Install runtime dependencies

RUN apk add --no-cache \

libc6-compat \

openssl \

dumb-init && \

addgroup --system --gid 1001 nodejs && \

adduser --system --uid 1001 nextjs

# Copy production node_modules (already pruned)

COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules

# Copy built application

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

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

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

# Copy Prisma files

COPY --from=builder --chown=nextjs:nodejs /app/prisma ./prisma

COPY --from=builder --chown=nextjs:nodejs /app/node_modules/.prisma ./node_modules/.prisma

COPY --from=builder --chown=nextjs:nodejs /app/node_modules/@prisma/client ./node_modules/@prisma/client

# Copy entrypoint

COPY --chown=nextjs:nodejs docker-entrypoint.sh ./

RUN chmod +x docker-entrypoint.sh

USER nextjs

EXPOSE 3001

HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \

CMD node -e "require('http').get('http://localhost:3001/api/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))"

ENTRYPOINT ["dumb-init", "./docker-entrypoint.sh"]