Using node.js to deploy a smart contract

index.js

const Web3 = require('web3');
const fs = require('fs');
const solc = require('solc');

/*
* connect to ethereum node
*/ 
const ethereumUri = 'http://localhost:8540';
const address = '0x004ec07d2329997267Ec62b4166639513386F32E'; // user

let web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider(ethereumUri));

if(!web3.isConnected()){
    throw new Error('unable to connect to ethereum node at ' + ethereumUri);
}else{
    console.log('connected to ehterum node at ' + ethereumUri);
    let coinbase = web3.eth.coinbase;
    console.log('coinbase:' + coinbase);
    let balance = web3.eth.getBalance(coinbase);
    console.log('balance:' + web3.fromWei(balance, 'ether') + " ETH");
    let accounts = web3.eth.accounts;
    console.log(accounts);
    
    if (web3.personal.unlockAccount(address, 'user')) {
        console.log(`${address} is unlocaked`);
    }else{
        console.log(`unlock failed, ${address}`);
    }
}

/*
* Compile Contract and Fetch ABI
*/ 
let source = fs.readFileSync("./contracts/BasicToken.sol", 'utf8');

console.log('compiling contract...');
let compiledContract = solc.compile(source);
console.log('done');

for (let contractName in compiledContract.contracts) {
    // code and ABI that are needed by web3 
    // console.log(contractName + ': ' + compiledContract.contracts[contractName].bytecode);
    // console.log(contractName + '; ' + JSON.parse(compiledContract.contracts[contractName].interface));
    var bytecode = compiledContract.contracts[contractName].bytecode;
    var abi = JSON.parse(compiledContract.contracts[contractName].interface);
}

console.log(JSON.stringify(abi, undefined, 2));

/*
* deploy contract
*/ 
let gasEstimate = web3.eth.estimateGas({data: '0x' + bytecode});
console.log('gasEstimate = ' + gasEstimate);
let MyContract = web3.eth.contract(abi);
console.log('deploying contract...');
let myContractReturned = MyContract.new( {
    from: address,
    data: '0x'+ bytecode,
    gas: gasEstimate + 50000
}, function (err, myContract) {
    if (!err) {
        // NOTE: The callback will fire twice!
        // Once the contract has the transactionHash property set and once its deployed on an address.

        // e.g. check tx hash on the first call (transaction send)
        if (!myContract.address) {
            console.log(`myContract.transactionHash = ${myContract.transactionHash}`); // The hash of the transaction, which deploys the contract

        // check address on the second call (contract deployed)
        } else {
            console.log(`myContract.address = ${myContract.address}`); // the contract address
            global.contractAddress = myContract.address;
        }

        // Note that the returned "myContractReturned" === "myContract",
        // so the returned "myContractReturned" object will also get the address set.
    } else {
        console.log(err);
    }
});


(function wait () {
    setTimeout(wait, 1000);
})();

I am getting the following error.. can you tell me how to solve it?
Error: Account not found
at Object.InvalidResponse (/home/ramesh/projects/DemoSmartContract/node_modules/web3/lib/web3/errors.js:38:16)
at RequestManager.send (/home/ramesh/projects/DemoSmartContract/node_modules/web3/lib/web3/requestmanager.js:61:22)
at Personal.send [as unlockAccount] (/home/ramesh/projects/DemoSmartContract/node_modules/web3/lib/web3/method.js:145:58)
at Object. (/home/ramesh/projects/DemoSmartContract/index.js:25:23)
at Module._compile (internal/modules/cjs/loader.js:702:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
at Module.load (internal/modules/cjs/loader.js:612:32)
at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
at Function.Module._load (internal/modules/cjs/loader.js:543:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:744:10)

Check your account is there or not.

Step to check on console.:
1: go to geth.ipc console.
2: type web3.coinbase or web3.eth.getAccounts()
3.Check the address

Check your account is there or not.

Step to check on console:

1. go to geth.ipc console.
2. type web3.coinbase or web3.eth.getAccounts()
3. check the address
4. finish