Install Helm as objects

Rather than running helm on the client and passing it to kubectl, just
install Flux and set the Helm repos on the server side

Add resolv.conf to the Kubernetes config so that the hosts can resolve
hostnames in order to pull down the Helm repositories

Add backups to the database configurations

modules/nixos/kubernetes.nix

@@ -27,6 +27,7 @@ in
     };
 
     environment.systemPackages = [
+      pkgs.fluxcd
       pkgs.kubectl-cnpg
       pkgs.kubernetes-helm
       pkgs.kustomize
@@ -59,6 +60,7 @@ in
         "--service-cidr=10.221.0.0/16"
         "--write-kubeconfig-mode 0640"
         "--write-kubeconfig-group kubeconfig"
+        "--resolv-conf=/etc/resolv.conf"
         "--tls-san ${config.networking.hostName}.home"
         "--tls-san ${config.networking.hostName}.thehellings.lan"
         "--tls-san ${config.networking.hostName}.shire-zebra.ts.net"