Discord challenge #2 - This dockerfile will not build on NodeOps. What is wrong with it?

challenge.yaml

# Use Node.js 24 slim for ARM64 architecture
FROM --platform=linux/arm64 node:24-slim AS base

# Install dependencies only when needed
FROM base AS deps
WORKDIR /app

# Copy package files first
COPY package.json package-lock.json* ./

# Install dependencies
RUN npm install

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build the application
RUN npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

# Copy built application
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Use node to run the standalone server
CMD ["node", "server.js"]