Add arg for get of app version

Author: ChugunovRoman

src/args.rs

@@ -0,0 +1,13 @@
+use std::{env, process};
+
+pub fn init() {
+  let mut args = env::args();
+  args.next();
+
+  if let Some(version) = args.next() {
+    if version == "-v" {
+      println!("{}", env!("CARGO_PKG_VERSION"));
+      process::exit(0);
+    }
+  }
+}

src/main.rs

@@ -1,10 +1,12 @@
 mod app;
+mod args;
 mod config;
 mod log;
 mod routes;
 mod server;
 
 fn main() {
+  args::init();
   log::init();
   app::init();
 }