diff --git a/srv/cmd/gatekeeper/main.go b/srv/cmd/gatekeeper/main.go
index 175670a..ac56f15 100644
--- a/srv/cmd/gatekeeper/main.go
+++ b/srv/cmd/gatekeeper/main.go
@@ -1,11 +1,16 @@
 package main
 
 import (
-	"Crimson-Gatekeeper/internal/application"
+	"net/http"
 
 	"github.com/go-spring/spring-core/gs"
 )
 
+type Test struct{}
+
 func main() {
-	gs.Provide(application.New).AsServer()
+	http.HandleFunc("/echo", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("hello world!"))
+	})
+	gs.Run()
 }
diff --git a/srv/internal/application/application.go b/srv/internal/application/application.go
index 7b0e8e0..0365add 100644
--- a/srv/internal/application/application.go
+++ b/srv/internal/application/application.go
@@ -1,14 +1,26 @@
 package application
 
 import (
+	"context"
+
 	"github.com/gin-gonic/gin"
+	"github.com/go-spring/spring-core/gs"
 )
 
 type Controller interface {
 	RegisterRoute()
 }
 
-func New() *gin.Engine {
-	app := gin.Default()
-	return app
+type AppPak struct {
+	core *gin.Engine
+}
+
+func (s *AppPak) ListenAndServe(sig gs.ReadySignal) error {
+	s.core = gin.Default()
+	s.core.Run("7777")
+	return nil
+}
+
+func (_ *AppPak) Shutdown(ctx context.Context) error {
+	return nil
 }