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+# Claw3D - 3D agent visualization for OpenClaw.
+# Multi-stage build: install prod deps -> build Next.js -> run with custom server.
+
+FROM node:20-slim AS deps
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --ignore-scripts --omit=dev
+
+FROM node:20-slim AS builder
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --ignore-scripts
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+# Build-time gateway URL (overridden at runtime by CLAW3D_GATEWAY_URL).
+ENV NEXT_PUBLIC_GATEWAY_URL=ws://127.0.0.1:18789
+RUN npm run build
+
+FROM node:20-slim AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+
+# Copy built app + custom server + production node_modules only.
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/server ./server
+COPY --from=deps /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/next.config.ts ./next.config.ts
+
+EXPOSE 3000
+
+CMD ["node", "server/index.js"]