Make an anvil shadow-fork persistent

[marcello33]

Hello,
I have a running ethereum testnet node on a server, running on port 8545, and I started a shadow fork of it, with anvil, by using the command anvil --fork-url http://localhost:8545 --port 9545
I wonder how can I make the state of the shadow fork persistent, so that - for example - I could stop the node, shut down the machine, and restore the state next time I spin up the server and the node.
Thank you