refactor: adjust project structure

test/service/service_test.go

@@ -1,7 +1,7 @@
-package services
+package service
 
 import (
-	"health-go/routers"
+	"health-go/router"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -10,11 +10,11 @@ import (
 )
 
 func TestPingRoute(t *testing.T) {
-	router := routers.SetupRouter()
+	r := router.SetupRouter()
 
 	w := httptest.NewRecorder()
 	req, _ := http.NewRequest("GET", "/fetchHosList", nil)
-	router.ServeHTTP(w, req)
+	r.ServeHTTP(w, req)
 
 	assert.JSONEq(t, `{"code: 20"}`, w.Body.String())
 }