cluster/admitomatic: finish up service

This turns admitomatic into a self-standing service that can be used as
an admission controller.

I've tested this E2E on a local k3s server, and have some early test
code for that - but that'll land up in a follow up CR, as it first needs
to be cleaned up.

Change-Id: I46da0fc49f9d1a3a1a96700a36deb82e5057249b
diff --git a/cluster/admitomatic/BUILD.bazel b/cluster/admitomatic/BUILD.bazel
index 4d5aebc..55c7466 100644
--- a/cluster/admitomatic/BUILD.bazel
+++ b/cluster/admitomatic/BUILD.bazel
@@ -5,15 +5,18 @@
     srcs = [
         "ingress.go",
         "main.go",
+        "service.go",
     ],
     importpath = "code.hackerspace.pl/hscloud/cluster/admitomatic",
     visibility = ["//visibility:private"],
     deps = [
+        "//cluster/admitomatic/config:go_default_library",
         "//go/mirko:go_default_library",
         "@com_github_golang_glog//:go_default_library",
         "@io_k8s_api//admission/v1beta1:go_default_library",
         "@io_k8s_api//networking/v1beta1:go_default_library",
         "@io_k8s_apimachinery//pkg/apis/meta/v1:go_default_library",
+        "@org_golang_google_protobuf//encoding/prototext:go_default_library",
     ],
 )