backend swagger/redoc 추가

backend/internal/handler/admin_auth.go

@@ -0,0 +1,20 @@
+package handler
+
+import (
+	"os"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func requireAdmin(c *fiber.Ctx) error {
+	adminPass := os.Getenv("ADMIN_PASSWORD")
+	if adminPass == "" {
+		adminPass = "admin"
+	}
+
+	reqPass := c.Get("X-Admin-Password")
+	if reqPass != adminPass {
+		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "Invalid Admin Password"})
+	}
+	return nil
+}