fix: restrict access to docker containers page to admins (#912)

apps/nextjs/src/app/[locale]/manage/tools/docker/page.tsx

@@ -1,12 +1,19 @@
+import { notFound } from "next/navigation";
 import { Stack, Title } from "@mantine/core";
 
 import { api } from "@homarr/api/server";
+import { auth } from "@homarr/auth/next";
 import { getScopedI18n } from "@homarr/translation/server";
 
 import { DynamicBreadcrumb } from "~/components/navigation/dynamic-breadcrumb";
 import { DockerTable } from "./docker-table";
 
 export default async function DockerPage() {
+  const session = await auth();
+  if (!session?.user || !session.user.permissions.includes("admin")) {
+    notFound();
+  }
+
   const { containers, timestamp } = await api.docker.getContainers();
   const tDocker = await getScopedI18n("docker");