feat: Make bind ip configurable through cli

src/cli.rs

@@ -1,3 +1,4 @@
+use std::net::IpAddr;
 use std::path::PathBuf;
 
 use clap::{Args, Parser, Subcommand};
@@ -50,5 +51,8 @@ pub enum Commands {
     /// Generate completions for your current shell
     ShellCompletions,
     /// Serve config files over tftp
-    Serve,
+    Serve {
+        #[arg(long, default_value = "0.0.0.0")]
+        ip: IpAddr,
+    },
 }