We want to put a gateway in front of the frontend service so that we can scale the frontend to more than one instance. To do this we will use docker-compose with a couple of frontend containers (frontend1 and frontend2). Your challenge is to update the gateway/gateway.config.yml with the urls pointing to frontend1 and frontend2, then add links in the docker-compose for the gateway to reference the frontend1 and frontend2 instances. Verify the results by running docker-compose up -d and navigating to the gateway port (localhost:8080).
hint information on express-gateway can be found at http://express-gateway.io
hint docker-compose documentation can be found at https://docs.docker.com/compose/compose-file/compose-file-v2/