Add skycam host

hosts/skycam/default.nix

@@ -0,0 +1,71 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../server.nix
+  ];
+
+  hardware = {
+    raspberry-pi."4" = {
+      apply-overlays-dtmerge.enable = true;
+      audio.enable = false;
+      fkms-3d.enable = true;    # VideoCore with 512 MB CMA reservation
+      tc358743.enable = true;   # HDMI-to-CSI-2 converter
+      xhci.enable = false;
+    };
+    firmware = with pkgs; [
+      firmwareLinuxNonfree
+      wireless-regdb
+    ];
+  };
+
+  networking = {
+    hostId = "731d1660";
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [ 8080 ];
+      allowedUDPPorts = [ 8080 ];
+    };
+  };
+
+  systemd.services.ustreamer = {
+    enable = true;
+    description = "uStreamer service";
+    unitConfig = {
+      Type = "simple";
+    };
+    serviceConfig = {
+      ExecStartPre = ''${pkgs.v4l-utils}/bin/v4l2-ctl \
+        --device=/dev/video0 \
+        --fix-edid-checksums \
+        --info-edid
+      '';
+      ExecStart = ''${pkgs.unstable.ustreamer}/bin/ustreamer \
+        --device=/dev/video0 \
+        --resolution=1280x720 \
+        --format=uyvy \
+        --encoder=m2m-image \
+        --workers=3 \
+        --persistent \
+        --dv-timings \
+        --drop-same-frames=30 \
+        --host=0.0.0.0 \
+        --port=8080
+      '';
+    };
+    wantedBy = [ "network-online.target" ];
+    confinement.mode = "chroot-only";
+  };
+
+  environment.systemPackages = with pkgs; [
+    git
+    neovim
+    libraspberrypi
+    raspberrypi-eeprom
+    v4l-utils
+    unstable.ustreamer
+  ];
+
+  system.stateVersion = "24.05";
+}