modify compile command (#333)

* modify compile command

* fix(READMD.md): compile from git

* Update README_CN.md

README.md

@@ -47,7 +47,7 @@ EasyTier is a simple, safe and decentralized VPN networking solution implemented
 3. **Install from source code**
 
     ```sh
-    cargo install --git https://github.com/EasyTier/EasyTier.git
+    cargo install --git https://github.com/EasyTier/EasyTier.git easytier
     ```
 
 4. **Install by Docker Compose**

README_CN.md

@@ -47,7 +47,7 @@
 3. **通过源码安装**
 
     ```sh
-    cargo install --git https://github.com/EasyTier/EasyTier.git
+    cargo install --git https://github.com/EasyTier/EasyTier.git easytier
     ```
 
 4. **通过Docker Compose安装**