Enable Static Peer ID (#12220)

* static peer id

* kasey's review

cmd/flags.go

@@ -144,6 +144,11 @@ var (
 		Usage: "The file containing the private key to use in communications with other peers.",
 		Value: "",
 	}
+	P2PStaticID = &cli.BoolFlag{
+		Name:  "p2p-static-id",
+		Usage: "Enables the peer id of the node to be fixed by saving the generated network key to the default key path.",
+		Value: false,
+	}
 	// P2PMetadata defines a flag to specify the location of the peer metadata file.
 	P2PMetadata = &cli.StringFlag{
 		Name:  "p2p-metadata",