Change default server bridge with an env variable

board-frontend/src/app.rs

@@ -132,7 +132,8 @@ pub fn game_view() -> Html {
 
 #[function_component(App)]
 pub fn app() -> Html {
-    let remote = use_state(|| "ws://localhost:8081/ws".to_string());
+    let bridge = option_env!("BRIDGE_HOSTNAME").unwrap_or("ws://localhost:8080/ws");
+    let remote = use_state(|| bridge.to_string());
     let player_name = use_state(|| None);
     let room_name = use_state(|| None);
 
@@ -207,7 +208,7 @@ pub fn app() -> Html {
         <main>
             <div>
                 <label>{"Server: "}</label>
-                <input type="text" required={true} value={"ws://localhost:8081"} ref={remote_ref} />
+                <input type="text" required={true} value={bridge} ref={remote_ref} />
             </div>
             <div>
                 <label>{"Player name: "}</label>