feat: add distributed-builds & many hosts

feat: remove nur & devenv
feat: adjust the structure to make it suitable for servers
feat: add iso/proxmox generators and add docs about it
feat: update ryan's openssh keys & add hashedPassword
feat: add proxmox's nodes into ssh_config, with alias

hosts/idols/ruby/default.nix

@@ -0,0 +1,68 @@
+{ ... } @args:
+
+
+#############################################################
+#
+#  Ruby - a NixOS VM running on Proxmox
+#
+#############################################################
+
+
+{
+  imports = [
+    ../../../modules/nixos/proxmox-hardware-configuration.nix
+
+    ../../../modules/nixos/core-server.nix
+    ../../../modules/nixos/user-group.nix
+  ];
+
+  nixpkgs.overlays = import ../../../overlays args;
+
+
+  # Enable binfmt emulation of aarch64-linux, this is required for cross compilation.
+  boot.binfmt.emulatedSystems = [ "aarch64-linux" "riscv64-linux" ];
+  # supported fil systems, so we can mount any removable disks with these filesystems
+  boot.supportedFilesystems = [
+    "ext4"
+    "btrfs"
+    "xfs"
+    #"zfs"
+    "ntfs"
+    "fat"
+    "vfat"
+    "exfat"
+    "cifs" # mount windows share
+  ];
+
+  networking = {
+    hostName = "ruby"; # Define your hostname.
+    wireless.enable = false; # Enables wireless support via wpa_supplicant.
+
+    # Configure network proxy if necessary
+    # proxy.default = "http://user:password@proxy:port/";
+    # proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+    networkmanager.enable = true;
+    interfaces.ens18 = {
+      useDHCP = false;
+      ipv4.addresses = [{
+        address = "192.168.5.102";
+        prefixLength = 24;
+      }];
+    };
+    defaultGateway = "192.168.5.201";
+    nameservers = [
+      "119.29.29.29" # DNSPod
+      "223.5.5.5" # AliDNS
+    ];
+  };
+
+  # 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 = "23.05"; # Did you read the comment?
+
+}