✨ Add instance settings and option to disable user registration (#1745)

apps/web/src/features/instance-settings/queries.ts

@@ -0,0 +1,18 @@
+"server-only";
+import { prisma } from "@rallly/database";
+import { cache } from "react";
+
+export const getInstanceSettings = cache(async () => {
+  const instanceSettings = await prisma.instanceSettings.findUnique({
+    where: {
+      id: 1,
+    },
+    select: {
+      disableUserRegistration: true,
+    },
+  });
+
+  return {
+    disableUserRegistration: instanceSettings?.disableUserRegistration ?? false,
+  };
+});