Added the rest of the configuration. Still some things to add.

modules/packages/default.nix

@@ -0,0 +1,9 @@
+{ ... }:
+
+{
+  imports = [
+    ./packages.nix
+    ./podman.nix
+    ./ssh.nix
+  ];
+}

modules/packages/packages.nix

@@ -0,0 +1,25 @@
+{ config, pkgs, ... }:
+
+{
+  nixpkgs.config.allowUnfree = true;
+
+  environment.systemPackages = with pkgs; [
+    git
+    ncdu
+    fastfetch
+    tpm2-tss
+    sops
+    age
+    powertop
+    pciutils
+    hdparm
+    hd-idle
+    hddtemp
+    smartmontools
+    cpufrequtils
+    intel-gpu-tools
+    snapraid
+    mergerfs
+    mergerfs-tools
+  ];
+}

modules/packages/podman.nix

@@ -0,0 +1,13 @@
+{ config, pkgs, ...}:
+
+{
+  virtualisation.podman.enable = true;
+  virtualisation.podman.defaultNetwork.settings.dns_enabled = true;
+
+  environment.systemPackages = with pkgs; [
+    podman
+    podman-compose
+    podman-tui
+    slirp4netns
+  ];
+}

modules/packages/ssh.nix

@@ -0,0 +1,5 @@
+{ config, ... }:
+
+{
+  services.openssh.enable = true;
+}