docker/local: add production-prebuilt stage and use it in docker-compose.yml

Dockerfile

@@ -63,3 +63,29 @@ HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
 
 # Start the application with startup script
 CMD ["/app/start.sh"]
+
+# Prebuilt runtime stage (used locally): copies prebuilt dist and server-dist from context
+FROM node:22-alpine AS production-prebuilt
+
+RUN npm install -g pnpm ts-node && apk add --no-cache su-exec curl
+WORKDIR /app
+
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
+RUN pnpm install --frozen-lockfile --prod
+
+# Copy prebuilt artifacts from repository
+COPY dist ./dist
+COPY server-dist ./server-dist
+COPY public ./public
+COPY start.sh ./start.sh
+
+RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001 \
+  && chmod +x /app/start.sh \
+  && chown -R nextjs:nodejs /app \
+  && chown root:root /app/.storage 2>/dev/null || true
+
+EXPOSE 3000
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:3000/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) })" || exit 1
+
+CMD ["/app/start.sh"]