This helper would be a separate CLI subcommand generating a config file for the user.
Here's a comment by @johny-b about this:
dapp-runner config create can find yagna and ask it about the app key so that dapp-runner user can forget about the $YAGNA_APPKEY thing. Maybe it could also somehow fill the payment-related fields, e.g. if we have payments initialized for zksync then the config file would also have zksync?
This helper would be a separate CLI subcommand generating a config file for the user. Here's a comment by @johny-b about this: