BIG changes. Make almost every server service modular, to distribute among multiple servers

modules/system/services/server/nginx/default.nix

@@ -0,0 +1,28 @@
+{ config, lib, ... }:
+{
+  imports = [
+    ./acme
+    ./rtmp
+    ./user
+    ./virtualhosts
+  ];
+
+  options.services.webserver.enable = lib.mkEnableOption "Enable nginx related services";
+
+  config = lib.mkIf config.system.server.enable {
+    services.nginx = {
+      enable = true;
+      recommendedTlsSettings = true;
+      recommendedOptimisation = true;
+      recommendedGzipSettings = true;
+      recommendedProxySettings = true;
+    };
+
+    networking.firewall.allowedTCPPorts = [
+      80
+      443
+    ];
+
+    environment.persistence."/persist".directories = [ "/var/www" ];
+  };
+}