fix: default app name

Fix the default application name to correspond to the repository name.

src/app/app.constants.ts

@@ -1,3 +1,3 @@
 export const APP_VERSION = process.env.npm_package_version ?? 'unversioned';
-export const APP_NAME = process.env.npm_package_name ?? 'unnamed';
+export const APP_NAME = process.env.npm_package_name ?? 'lido-keys-api';
 export const APP_DESCRIPTION = process.env.npm_package_description ?? 'lido-keys-api';