fix: add Cargo.lock back to repository for binary crate

Author: chojuninengu

.gitignore

@@ -1,2 +1,4 @@
-/target
+/target/
+**/*.rs.bk
+Cargo.lock
 .qodo

src/bin/server/main.rs

@@ -5,7 +5,7 @@ pub mod user;
 
 use connection::serve;
 
-
+ 
 use async_std::prelude::*;
 use async_std::net::TcpListener;
 use async_std::task;