Ah, I see the problem. I deployed this at first:

let service = new cloud.Service("basic-web", {
    containers: {
        nginx: {
            build: "./app",
            memory: 256,
            ports: [{port: 8080}]
        }
    },
    replicas: 2
});

And then forgot I changed

nginx

to

basic_web

causing that exception. How am I supposed to rename my containers?