Move kubernetes to kustomize, since thats what it is

docs/examples/kubernetes/base/kustomization.yaml

@@ -1,42 +0,0 @@
-namespace: headscale
-resources:
-  - configmap.yaml
-  - ingress.yaml
-  - service.yaml
-generatorOptions:
-  disableNameSuffixHash: true
-configMapGenerator:
-  - name: headscale-site
-    files:
-      - derp.yaml=site/derp.yaml
-    envs:
-      - site/public.env
-  - name: headscale-etc
-    literals:
-      - config.json={}
-secretGenerator:
-  - name: headscale
-    files:
-      - secrets/private-key
-vars:
-  - name: PUBLIC_PROTO
-    objRef:
-      kind: ConfigMap
-      name: headscale-site
-      apiVersion: v1
-    fieldRef:
-      fieldPath: data.public-proto
-  - name: PUBLIC_HOSTNAME
-    objRef:
-      kind: ConfigMap
-      name: headscale-site
-      apiVersion: v1
-    fieldRef:
-      fieldPath: data.public-hostname
-  - name: CONTACT_EMAIL
-    objRef:
-      kind: ConfigMap
-      name: headscale-site
-      apiVersion: v1
-    fieldRef:
-      fieldPath: data.contact-email