Switch to flannel, ignore k8s interfaces for zerotier, hard code dns for both k8s and docker due to systemd resolvd, and disable ipv6

ansible/roles/kubernetes/templates/cert-manager-prod-issuer.yaml

@@ -0,0 +1,19 @@
+apiVersion: cert-manager.io/v1alpha2
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-prod
+spec:
+  acme:
+    # The ACME server URL
+    server: https://acme-v02.api.letsencrypt.org/directory
+    # Email address used for ACME registration
+    email: jacob.wimer@gmail.com
+    # Name of a secret used to store the ACME account private key
+    privateKeySecretRef:
+      name: letsencrypt-prod
+    # Enable the HTTP-01 challenge provider
+    solvers:
+    - http01:
+        ingress:
+          class: nginx
+      selector: {}