updated the config

src/main/java/com/yatl/AppConfig.java

 package com.yatl;
+
 import io.javalin.Javalin;
 
 public class AppConfig {
-	
+
 	public static Javalin startServer(int port) {
-		
 		Javalin app = Javalin.create().start(port);
-		
+
 		app.get("/todos", ctx -> ctx.result("get all todos"));
-		app.get("/todos/{id}", ctx -> ctx.result("get all todos"));
-		
+		app.get("/todos/{id}", ctx -> ctx.result("get a single todo"));
+
 		return app;
-		
 	}
-	
+
 }