Adding code to print version

src/main.rs

@@ -5,4 +5,10 @@ pub mod version;
 #[tokio::main]
 async fn main() {
     println!("sender");
+    let args: Vec<String> = std::env::args().collect();
+
+    if version::contains_version(&args) {
+        version::print_version();
+        std::process::exit(-1);
+    }
 }