update readme

README.md

@@ -1,15 +1,7 @@
-# Rust project scaffold
+# 用 rust 复刻 https://git.jeffthecoder.xyz/public/chat-signaling-server
 
-## use this repo
+## 构建
 
-```
-nix-shell -p cargo --run 'cargo update'
-nix-shell --expr 'with import <nixpkgs> {}; rustPackages.callPackage ./shell.nix {}'
-```
-
-or with flakes
-
-```
-nix shell nixpkgs#cargo --run cargo update
-nix develop
+```bash
+docker load -i $(nix-build --expr  '(import <nixpkgs> {}).callPackage ./docker-image.nix {}')
 ```