This helmchart helps to deploy an kubernetes apiserver to be extended by the gardener-apiserver. This is mostly a clone from the garden-kube-apiserver helmchart from garden-setup. Two minor differences are the ability to set custom annotations for the ingress of the apiserver and that you can tell the apiserver to place a bootstrap kubeconfig for a gardenlet.
Use ingress.annotations to add custom annotations to the ingress of the apiserver.
Set gardenletBootstrap.createToken to true to place a bootstrap kubeconfig. You can set the values of the token and the secret via gardenletBootstrap.token and gardenletBootstrap.secret. The ca can be set via tls.kubeAPIServer.ca.crt.