fix: update readme and root.go

Author: ncode

README.md

@@ -33,7 +33,7 @@ These instructions will help you set up and run `vault-audit-filter` on your loc
 
 ### Prerequisites
 
-- **Go**: Ensure you have Go 1.22.3 or later installed. You can download it here: <https://golang.org/dl/>
+- **Go**: Ensure you have Go 1.25.5 or later installed. You can download it here: <https://golang.org/dl/>
 - **Vault**: You should have HashiCorp Vault installed and configured. Instructions can be found here: <https://www.vaultproject.io/docs/install>
 
 ### Installation
@@ -143,16 +143,34 @@ Rules are written using the `expr` language, a simple and safe expression langua
 
 ## Usage
 
-To run `vault-audit-filter` with your configuration file, use:
+`vault-audit-filter` provides two subcommands:
+
+### Setup Vault Audit Device
+
+Configure Vault to send audit logs to this service:
+
+```bash
+./vault-audit-filter setup --config config.yaml
+```
+
+### Start the Audit Server
+
+Start the UDP server to receive and filter Vault audit logs:
 
 ```bash
-$ ./vault-audit-filter --config config.yaml
+./vault-audit-filter auditServer --config config.yaml
 ```
 
 ### Command-Line Options
 
-- `--config`: Specify the path to the configuration file (default is `config.yaml`).
-- `--log-level`: Set the logging level (`debug`, `info`, `warn`, `error`).
+**Global flags:**
+
+- `--config`: Specify the path to the configuration file (default is `$HOME/.vault-audit-filter.yaml`).
+- `--vault.address`: Vault server address (default: `http://127.0.0.1:8200`).
+- `--vault.token`: Vault authentication token.
+- `--vault.audit_path`: Path for the Vault audit device (default: `/vault-audit-filter`).
+- `--vault.audit_address`: Address for receiving audit logs (default: `127.0.0.1:1269`).
+- `--vault.audit_description`: Description for the Vault audit device.
 
 ### Environment Variables
 

cmd/root.go

@@ -35,16 +35,14 @@ var cfgFile string
 // rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
 	Use:   "vault-audit-filter",
-	Short: "A brief description of your application",
-	Long: `A longer description that spans multiple lines and likely contains
-examples and usage of using your application. For example:
-
-Cobra is a CLI library for Go that empowers applications.
-This application is a tool to generate the needed files
-to quickly create a Cobra application.`,
-	// Uncomment the following line if your bare application
-	// has an action associated with it:
-	// Run: func(cmd *cobra.Command, args []string) { },
+	Short: "Filter and log HashiCorp Vault audit logs based on configurable rules",
+	Long: `vault-audit-filter is a tool designed to filter and log HashiCorp Vault
+audit logs based on configurable rules. It provides fine-grained control over
+how Vault audit events are processed and categorized, allowing you to capture
+critical events while reducing noise from routine operations.
+
+Use 'setup' to configure Vault to send audit logs to this service.
+Use 'auditServer' to start the UDP server that receives and filters logs.`,
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.