fix: fix subdomain retrieval

src/app.ts

@@ -91,7 +91,7 @@ AppDataSource.initialize().then(async () => {
 		
 		// Retrieve url, subdomain from request.
 		let uri: string = req.url.slice(1); // discards / from /abc, /abc -> abc
-		let subdomain: string | null = req.headers.host!.replace(rs.fqdn, '') || null;
+		let subdomain: string | null = req.headers.host!.replace(rs.fqdn, '').slice(0, -1) || null; // slice() to remove trailing dot
 
 		// Try to lookup the url in DB
 		const reversedLink: Link | null = await linkService.lookupUriWithExpiryValidation(uri, subdomain);