docs: network command (ignite#2890)

* docs: `network` command

I've decided to have the most straightforward tutorial in the command description, mainly because users need to know what to look for in the documentation. It may be extracted into a separate article in the docs. In that case, we'll still need to have a link to that article in this cmd doc.

* Update ignite/cmd/network.go

Co-authored-by: Lucas Bertrand <[email protected]>

* format

Co-authored-by: Lucas Bertrand <[email protected]>
Co-authored-by: Alex Johnson <[email protected]>

ignite/cmd/network.go

@@ -42,8 +42,55 @@ func NewNetwork() *cobra.Command {
 	c := &cobra.Command{
 		Use:     "network [command]",
 		Aliases: []string{"n"},
-		Short:   "Launch a blockchain network in production",
-		Args:    cobra.ExactArgs(1),
+		Short:   "Launch a blockchain in production",
+		Long: `
+Ignite Network commands allow to coordinate the launch of sovereign Cosmos blockchains.
+
+To launch a Cosmos blockchain you need someone to be a coordinator and others to
+be validators. These are just roles, anyone can be a coordinator or a validator.
+A coordinator publishes information about a chain to be launched on the Ignite
+blockchain, approves validator requests and coordinates the launch. Validators
+send requests to join a chain and start their nodes when a blockchain is ready
+for launch.
+
+To publish the information about your chain as a coordinator run the following
+command (the URL should point to a repository with a Cosmos SDK chain):
+
+  ignite network chain publish github.com/ignite/example
+
+This command will return a launch identifier you will be using in the following
+commands. Let's say this identifier is 42.
+
+Next, ask validators to initialize their nodes and request to join the network
+as validators. For a testnet you can use the default values suggested by the
+CLI.
+
+  ignite network chain init 42
+
+  ignite network chain join 42 --amount 95000000stake
+
+As a coordinator list all validator requests:
+
+  ignite network request list 42
+
+Approve validator requests:
+
+  ignite network request approve 42 1,2
+
+Once you've approved all validators you need in the validator set, announce that
+the chain is ready for launch:
+
+  ignite network chain launch 42
+
+Validators can now prepare their nodes for launch:
+
+  ignite network chain prepare 42
+
+The output of this command will show a command that a validator would use to
+launch their node, for example “exampled --home ~/.example”. After enough
+validators launch their nodes, a blockchain will be live.
+`,
+		Args: cobra.ExactArgs(1),
 	}
 
 	// configure flags.