kafka http sink connector not sending data to URL hosted by Node

Iam following this link https://docs.confluent.io/kafka-connect-http/current/index.html#http-connector-header-forwarding

this is the project file , im using https://github.com/confluentinc/kafka-connect-http-demo

I have done configuring everything, but I could not able to send requested body to the URL which was hosted by Node/Python.

Could someone suggest any changes in configuration.

{
 "name": "test1",
 "config":
 {
    "topics": "kafka-data",
    "request.method": "POST",
    "tasks.max": "1",
    "connector.class": "io.confluent.connect.http.HttpSinkConnector",
    "http.api.url": "http://localhost:3000/api/messages",
    "key.converter": "org.apache.kafka.connect.storage.StringConverter",
    "value.converter": "org.apache.kafka.connect.storage.StringConverter",
    "confluent.topic.bootstrap.servers": "localhost:9092",
    "confluent.topic.replication.factor": "1",
    "reporter.bootstrap.servers": "localhost:9092",
    "reporter.result.topic.name": "success-responses",
    "reporter.result.topic.replication.factor": "1",
    "reporter.error.topic.name":"error-responses",
    "reporter.error.topic.replication.factor":"1"
  }
}

URL was hosted using Node.

const express = require('express')
const bodyParser = require('body-parser')
const app = express()
const port = 3000

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

let tempContainer = [];
app.get('/api/messages', (req, res) => {
    res.send({ 'all watchers': tempContainer })
})

app.post('/api/messages', (req, res) => {
    console.log('your req.body:', req.body);
    req.body.id = 'randumId_' + Math.floor(Math.random() * 10)
    tempContainer.push(req.body)
    res.send({ 'watchers log updated': req.body })
})

app.listen(port, () => {
    console.log(`Example app listening at http://localhost:${port}`)
})

this is my node code Thanks in advance.