(feat) Discord build share

src/lib/server/public-origin.ts

@@ -0,0 +1,13 @@
+import { env } from '$env/dynamic/private';
+
+export function publicOrigin(
+  fallback: string,
+  configuredOrigin: string | undefined = env.APP_ORIGIN,
+): string {
+  const value = configuredOrigin?.trim() || fallback;
+  const url = new URL(value);
+  if (url.protocol !== 'https:' && url.protocol !== 'http:') {
+    throw new Error('APP_ORIGIN must use HTTP or HTTPS.');
+  }
+  return url.origin;
+}