starlight: start tying openstreetmap stuff again

system/starlight/default.nix

@@ -11,6 +11,7 @@
     ./boot-config.nix
     ./hardware-configuration.nix
     ./scripts.nix
+    ./osm.nix
     ../../sets/builder.nix
     ../../sets/disc.nix
     ../../sets/fpga.nix

system/starlight/osm.nix

@@ -0,0 +1,12 @@
+{ config, pkgs, ... }:
+
+{
+  services.postgresql = {
+    enable = true;
+    package = pkgs.postgresql_16;
+    extraPlugins = with config.services.postgresql.package.pkgs; [ postgis ];
+
+    ensureDatabases = [ "osm" ];
+    ensureUsers = [ { name = "artemis"; } ];
+  };
+}