refactor: cleaned up nixos dir

nixos/modules/services/owncast/default.nix

@@ -0,0 +1,43 @@
+{ flake, ... }:
+let
+  inherit (flake.config.services.instances)
+    owncast
+    web
+    ;
+  service = owncast;
+  localhost = web.localhost.address1;
+  host = "${service.subdomain}.${web.domains.url1}";
+in
+{
+  services = {
+    owncast = {
+      enable = true;
+      listen = localhost;
+      port = service.ports.port0;
+      openFirewall = true;
+    };
+
+    caddy = {
+      virtualHosts = {
+        "${host}" = {
+          extraConfig = ''
+            reverse_proxy ${localhost}:${toString service.ports.port0}
+
+            tls ${service.ssl.cert} ${service.ssl.key}
+          '';
+        };
+      };
+    };
+  };
+
+  networking = {
+    firewall = {
+      allowedTCPPorts = [
+        service.ports.port0
+        service.ports.port1
+      ];
+    };
+  };
+
+  # OBS Server rtmp://192.168.50.140:1935/live
+}