How to connect to a Temporal server using TLS

"How to start a TLS server using GitHub - temporalio/docker-compose: Temporal docker-compose files, and how to obtain the necessary client connection parameters:

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clientCertPair: {
  crt: fs.readFileSync(path.resolve(__dirname, 'client.crt')),
  key: fs.readFileSync(path.resolve(__dirname, 'client.key')),
}

On the server side, only ca.pem has been generated. How can I generate the private key?"