v3: review some more files, add logging for unhandled promises

website/src/libs/api-v3/logger.js

@@ -20,4 +20,15 @@ if (IS_PROD) {
     });
 }
 
+// Logs unhandled promises errors
+// when no catch is attached to a promise a unhandledRejection event will be triggered
+process.on('unhandledRejection', function handlePromiseRejection (reason, promise) {
+  let stack = reason.stack || reason.message || reason;
+
+  logger.error(stack, {
+    promise,
+    fullError: reason,
+  });
+});
+
 module.exports = logger;