message: doc: update doc for multi-nodes configuration
diff: @@ -41,7 +41,7 @@ Then edit the generated config files according to the in-line comments.
  ## Chain Spec
  The option `chain.spec` configures the chain spec, which controls which kind of chain to run.
  -This option is set to a chain used for development by default.
  +This option is set to Lina, the mainnet by default.
  The subcommand `init` supports exporting the default options for different
  chains. The following command lists all supported chains.
  @@ -50,7 +50,7 @@ chains. The following command lists all supported chains.
  ckb init --list-chains
  ```
  -Here is an example to export config files for testnet.
  +Here is an example to export config files for Aggron, the testnet.
  ```
  ckb init --chain testnet
  @@ -107,10 +107,12 @@ value = 5000
  Each node requires its own `<config-dir>`. Since the default ports will conflict, please export the config files and edit the listen ports in the config files.
  +The option `--genesis-message` is required to set to the same message for dev chain, because by default def chain generates a random genesis message. Nodes with different genesis messages cannot connect to each other.
  +
  ```
  mkdir node1 node2
  -ckb -C node1 init
  -ckb -C node2 init
  +ckb -C node1 init --chain dev --genesis-message dev-genesis
  +ckb -C node2 init --chain dev --genesis-message dev-genesis
  # Change listen ports 8114/8115 to 8116/8117 in node2/ckb.toml.
  # Change `rpc_url` in node2/ckb.toml to use 8116.
  # start node1
  