How to run helmfile-operator?

[soupdiver]

Hey,
I had a look at this project and tried to set it up on our cluster.
But I struggle with that. All the single pieces of this operator are described but there is on example or docs about how to actually deploy the operator. Or I'm missing something.
I fixed a couple of things to get the build running and usef this deployment to deploy.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: helmfile-operator
  namespace: core
spec:
  replicas: 1
  selector:
    matchLabels:
      app: helmfile-operator
  template:
    metadata:
      labels:
        app: helmfile-operator
    spec:
      containers:
      - name: helmfile-operator
        image: XXX.dkr.ecr.eu-central-1.amazonaws.com/helmfile-operator:latest

It's deployed but ended in a crash loop.
When running a container based on that image, all I see is the helmfile help.
I guess parameters/config are missing, because I haven't specified anything so far.