How would I create a Knative Service with 0 to 1 scaling with Emissary as my entrypoint? Could you provide me with YAML examples?
To create a Knative Service with 0 to 1 scaling and Emissary as the entrypoint, you can use the following YAML:

```yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: your-service-name
spec:
  template:
    spec:
      containers:
        - image: quay.io/emissary/emissary:latest
          name: emissary
          env:
            - name: TARGET_URL
              value: "http://target-service.default.svc.cluster.local"
      autoscaling:
        minScale: 0
        maxScale: 1
        class: kpa.autoscaling.knative.dev
```
In this YAML, we are defining a Knative Service called your-service-name, which uses a container image of Emissary. The environment variable TARGET_URL is set to the target URL that Emissary will route traffic to. The autoscaling section specifies a minimum scale of 0 and a maximum scale of 1, meaning that the service can scale down to 0 replicas when there is no traffic, and up to 1 replica when there is traffic. The class specified is the Knative Autoscaling class that implements autoscaling.