renamed site directory to server

internal/server/response/handler.go

@@ -0,0 +1,18 @@
+package response
+
+import (
+	"net/http"
+)
+
+type HandlerFunc = func(r *http.Request) (Response, error)
+
+func Handler(f HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		res, err := f(r)
+		if err != nil {
+			WriteError(w, err)
+		} else {
+			Write(w, r, res)
+		}
+	}
+}