Updates lambda functions with more robust err handling

server/lambda/get-cookies.js

@@ -21,7 +21,7 @@ exports.handler = async function(event, context) {
   } catch (error) {
     return {
       statusCode: 500,
-      body: JSON.stringify({ message: error.message }),
+      body: JSON.stringify({ error: error.message }),
     };
   }
 };