Host a LINE bot.
Webhook in one sentence.

Dockerfile

FROM node:22-slim
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev          # @line/bot-sdk, express
COPY . .
USER node
EXPOSE 8080
CMD ["node", "server.js"]

// server.js
// const line = require("@line/bot-sdk");
// const express = require("express");
// const config = { channelSecret: process.env.LINE_CHANNEL_SECRET };
// const client = new line.messagingApi.MessagingApiClient({
//   channelAccessToken: process.env.LINE_CHANNEL_ACCESS_TOKEN });
// const app = express();
// app.post("/webhook", line.middleware(config), async (req, res) => {
//   res.sendStatus(200);   // answer LINE first, then work
//   for (const e of req.body.events) if (e.type === "message")
//     await client.replyMessage({ replyToken: e.replyToken,
//       messages: [{ type: "text", text: e.message.text }] });
// });
// app.listen(process.env.PORT);

• LINE_CHANNEL_SECRET Basic settings; proves requests are from LINE
• LINE_CHANNEL_ACCESS_TOKEN Messaging API; to reply and push
• PORT the port the platform gives

Say this to your AI tool

Read https://app.agentlab.cresclab.com/agent/deploy.md and deploy this LINE bot to Agent Lab with the Dockerfile at agentlab.cresclab.com/en/deploy/line-bot: listen on $PORT, webhook at /webhook. Tell me where in the console to enter LINE_CHANNEL_SECRET and LINE_CHANNEL_ACCESS_TOKEN rather than asking for them in the chat. Give me the webhook URL when the build passes.