feat: add initial rpi4 config

rpi4.nix

@@ -0,0 +1,45 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    # ./hardware/base.nix
+    # ./system
+    ./system/nix.nix
+    ./system/i18n.nix
+    ./services/jellyfin.nix
+  ];
+
+  nixpkgs.config.allowUnfree = true;
+
+  # rpi4 base config
+  boot.loader.grub.enable = false;
+  boot.loader.raspberryPi.enable = true;
+  boot.loader.raspberryPi.version = 4;
+  boot.kernelPackages = pkgs.linuxPackages_rpi4;
+  boot.kernelParams = [
+    "console=ttyAMA0,115200"
+    "console=tty1"
+  ];
+  hardware.enableAllFirmware = true;
+
+  programs.zsh.enable = true;
+
+  services.openssh.enable = true;
+
+  users.users.felschr = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" "audio" "disk" ];
+    shell = pkgs.zsh;
+  };
+
+  home-manager = {
+    useUserPackages = true;
+    useGlobalPkgs = true;
+    users.felschr = import ./home/felschr-rpi4.nix;
+  };
+
+  # only change this when specified in release notes
+  system.stateVersion = "20.09";
+
+  system.autoUpgrade.enable = true;
+}