Minor refactoring; Add 'Features' section in README

.gitignore

@@ -10,4 +10,4 @@ Cargo.lock
 **/*.rs.bk
 
 # macOS-specific
-.DS_Store
+.DS_Store

README.md

@@ -4,6 +4,11 @@ Simple port forwarding TUI for Kubernetes 💻↔⎈
 
 ![portnord in action](./media/portnord.mov)
 
+## ✨ Features
+- List all ports exposed by services in a given namespace.
+- Toggle port forwarding for a specific port exposed by a service.
+- Toggle port forwarding for all ports exposed by a service.
+
 ## 🧩 Usage
 
 ```

src/main.rs

@@ -19,14 +19,14 @@ async fn run_app<'a>(ui: &mut ui::UI<'a>) -> ! {
 fn exit_app(error: Option<String>) -> ! {
     if let Some(err_msg) = error {
         println!("An error occurred: {}", err_msg);
-        std::process::exit(1);
+        std::process::exit(1)
     } else {
-        std::process::exit(0);
+        std::process::exit(0)
     }
 }
 
 #[tokio::main]
-async fn main() -> Result<(), kube::Error> {
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let Args { namespace: namespace_opt } = Args::collect();