refactor(nginx): Clean up nginx configuration

configuration/nginx/default.nix

@@ -0,0 +1,22 @@
+{ lib, ... }:
+{
+  imports = [
+    ./logging.nix
+    ./ssl.nix
+  ];
+
+  options.services.nginx.domain = lib.mkOption {
+    type = lib.types.str;
+    description = "The base domain name to append to virtual domain names";
+  };
+
+  config.services.nginx = {
+    enable = true;
+    recommendedTlsSettings = true;
+    recommendedOptimisation = true;
+    recommendedGzipSettings = true;
+    recommendedProxySettings = true;
+    clientMaxBodySize = "10G";
+    statusPage = true; # For metrics, should be accessible only from localhost
+  };
+}