diff --git a/srv/main.go b/srv/main.go
index 9f773c7..cf40ca6 100644
--- a/srv/main.go
+++ b/srv/main.go
@@ -25,19 +25,21 @@ type (
 
 func run() error {
 	f := os.Args[1]
-	b, err := os.ReadFile(f)
-	if err != nil {
-		return err
-	}
-
-	type Route struct {
-	}
-	var data Data
-	if err := yaml.Unmarshal(b, &data); err != nil {
-		return err
-	}
-
 	return http.ListenAndServe(":3001", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b, err := os.ReadFile(f)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		type Route struct {
+		}
+		var data Data
+		if err := yaml.Unmarshal(b, &data); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
 		k := r.URL.Path
 
 		v, ok := data.Routes[k]