feat(server): sign-up restrictions for self-hosted

packages/server/src/services/Authentication/GetAuthMeta.ts

@@ -0,0 +1,16 @@
+import { Service } from 'typedi';
+import { IAuthGetMetaPOJO } from '@/interfaces';
+import config from '@/config';
+
+@Service()
+export class GetAuthMeta {
+  /**
+   * Retrieves the authentication meta for SPA.
+   * @returns {Promise<IAuthGetMetaPOJO>}
+   */
+  public async getAuthMeta(): Promise<IAuthGetMetaPOJO> {
+    return {
+      signupDisabled: config.signupRestrictions.disabled,
+    };
+  }
+}