run most containers and back them up at home

* switch backup from wasabi-s3 to btrfs via ssh
* add srv0 at home
* run webserver and syncthing at home

nix/os/devices/srv0.home-ch.stefanjunker.de/system.nix

@@ -0,0 +1,93 @@
+{ pkgs
+, lib
+, config
+, ... }:
+
+let
+  keys = import ../../../variables/keys.nix;
+
+in {
+  # TASK: new device
+  networking.hostName = "srv0"; # Define your hostname.
+  # networking.domain =  "home-ch.stefanjunker.de";
+
+  networking.firewall.enable = true;
+  networking.firewall.allowedTCPPorts = [
+    # iperf3
+    5201
+  ];
+  networking.firewall.logRefusedConnections = false;
+
+  networking.usePredictableInterfaceNames = false;
+  networking.dhcpcd = {
+    enable = true;
+    persistent = true;
+  };
+
+  networking.interfaces.eth0 = {
+    useDHCP = true;
+    # ipv6.addresses = [
+    #   { address = "2a02:c207:3003:2387::1"; prefixLength = 64; }
+    # ];
+  };
+
+  # networking.defaultGateway6 = {
+  #   address = "fe80::1";
+  #   interface = "eth0";
+  # };
+
+  networking.nat = {
+    enable = true;
+    internalInterfaces = [ "ve-+" ];
+    externalInterface = "eth0";
+  };
+
+  # Kubernetes
+  # services.kubernetes.roles = ["master" "node"];
+
+  # virtualization
+  virtualisation = {
+    docker.enable = true;
+  };
+
+  nix.gc = {
+    automatic = true;
+  };
+
+  networking.useHostResolvConf = true;
+
+  containers = {
+    webserver = import ../../containers/webserver.nix {
+      hostAddress = "192.168.100.12";
+      localAddress = "192.168.100.13";
+
+      httpsPort = 443;
+    };
+
+    syncthing = import ../../containers/syncthing.nix {
+      hostAddress = "192.168.100.14";
+      localAddress = "192.168.100.15";
+
+      syncthingPort = 22000;
+    };
+
+    backup = import ../../containers/backup.nix {
+      inherit config;
+      hostAddress = "192.168.100.16";
+      localAddress = "192.168.100.17";
+      subvolumes = [
+        "webserver"
+        "backup"
+        "syncthing"
+      ];
+    };
+  };
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "20.03"; # Did you read the comment?
+}