Where is the chain code certificate?

[Varorbc]

fabric-samples/asset-transfer-basic/chaincode-typescript/package.json

Line 22 in 3826626

"start:server": "set -x && fabric-chaincode-node server --chaincode-address=$CHAINCODE_SERVER_ADDRESS --chaincode-id=$CHAINCODE_ID --chaincode-tls-key-file=/hyperledger/privatekey.pem --chaincode-tls-client-cacert-file=/hyperledger/rootcert.pem --chaincode-tls-cert-file=/hyperledger/cert.pem"

I want to start the chain code in my development environment, but I couldn't find the relevant certificate file. Did I miss something? Also, I would like to confirm how the peer node can check if I have truly successfully connected if the startup is successful. Thank you, looking forward to your reply.