fix: handle public folder

Dockerfile

@@ -12,11 +12,13 @@ FROM node:18-alpine
 
 WORKDIR /app
 
-COPY --from=builder /app/.next ./.next
-COPY --from=builder /app/node_modules ./node_modules
-COPY --from=builder /app/package.json ./package.json
-COPY --from=builder /app/public ./public
+ENV NODE_ENV=production
+
+# Copy only production dependencies and built files
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/public ./public 2>/dev/null || true
 
 EXPOSE 3000
 
-CMD ["npm", "start"]
+CMD ["node", "server.js"]