(Note: using "*" values for host whitelist and CORS origins is not a recommended way to run a production node securely, this configuration is intended for test or developement purpose only. For more information about these options, refer to the Besu CLI reference).
Create the folder .volumes/memento/ if it doesn't exist already
mkdir -p .volumes/memento/
Copy config-sample.yml into .volumes/memento/config.yml and set the eth.client.http and eth.client.ws attributes to http://127.0.0.1:8545 and ws://127.0.0.1:8546 respectively.