chore: self hosting docs update and certificate issues (#1847)

packages/lib/server-only/cert/cert-status.ts

@@ -0,0 +1,21 @@
+import * as fs from 'node:fs';
+
+import { env } from '@documenso/lib/utils/env';
+
+export type CertificateStatus = {
+  isAvailable: boolean;
+};
+
+export const getCertificateStatus = (): CertificateStatus => {
+  const defaultPath =
+    env('NODE_ENV') === 'production' ? '/opt/documenso/cert.p12' : './example/cert.p12';
+  const filePath = env('NEXT_PRIVATE_SIGNING_LOCAL_FILE_PATH') || defaultPath;
+
+  try {
+    fs.accessSync(filePath, fs.constants.F_OK | fs.constants.R_OK);
+    const stats = fs.statSync(filePath);
+    return { isAvailable: stats.size > 0 };
+  } catch {
+    return { isAvailable: false };
+  }
+};