feat: --bin docs

packages/cli/docs/src/cmd/serve.md

@@ -13,7 +13,8 @@ OPTIONS:
         --example <EXAMPLE>      [default: ""]
         --platform <PLATFORM>    [default: "default_platform"]
         --release                [default: false]
-        --hot-reload             [default: false]ß
+        --hot-reload             [default: false]
+        --bin                    [default: None]
 ```
 
 You can use this command to build project and start a dev server:
@@ -31,6 +32,14 @@ You can use the `example` option to serve a example:
 dioxus serve --exmaple test
 ```
 
+## Specify workspace bin
+
+You can add the `--bin` option to select which crate you want Dioxus to build and serve:
+
+```
+dioxus serve --bin app
+```
+
 ## Open Browser
 
 You can add the `--open` option to open system default browser when server startup: