chore: migrate nginx and site

hosts/disk/site.nix

@@ -0,0 +1,7 @@
+{ self, ... }: {
+  imports = [
+    (self + /modules/acme)
+    (self + /modules/nginx.nix)
+    (self + /modules/site.nix)
+  ];
+} 

hosts/disk/site6.nix

@@ -1,7 +0,0 @@
-{ self, ... }: {
-  imports = [
-    # (self + /modules/acme)
-    # (self + /modules/nginx.nix)
-    # (self + /modules/site.nix)
-  ];
-} 

modules/acme/default.nix

@@ -2,10 +2,12 @@
   inherit (config.networking) domain;
   inherit (lib) mkValue;
 in {
-  options.acmeGroup = mkValue "nginx";
+  options.acmeUsers = mkValue [];
 
   config.secrets.acmeEnvironment.file = ./environment.age;
 
+  config.users.groups.acme.members = config.acmeUsers;
+
   config.security.acme = {
     acceptTerms = true;
 
@@ -18,7 +20,7 @@ in {
 
     certs.${domain} = {
       extraDomainNames = [ "*.${domain}" ];
-      group            = config.acmeGroup;
+      group            = "acme";
     };
   };
 }

modules/mail/default.nix

@@ -1,6 +1,6 @@
 { self, config, lib, ... }: let
-  inherit (lib) const enabled genAttrs head mkDefault;
   inherit (config.networking) domain;
+  inherit (lib) const enabled genAttrs head mkDefault;
 in {
   imports = [(self + /modules/acme)];
 
@@ -14,7 +14,7 @@ in {
     paths = [ config.mailserver.dkimKeyDirectory config.mailserver.mailDirectory ];
   };
 
-  acmeGroup = "mail";
+  acmeUsers = [ "mail" ];
 
   mailserver = enabled {
     domains           = mkDefault [ domain ];

modules/nginx.nix

@@ -0,0 +1,56 @@
+{ config, lib, pkgs, ... }: let
+  inherit (lib) enabled mkConst;
+in {
+  options.nginxSslTemplate = mkConst {
+    forceSSL    = true;
+    quic        = true;
+    useACMEHost = config.networking.domain;
+  };
+
+  options.nginxHeaders = mkConst ''
+    add_header Strict-Transport-Security $hsts_header;
+
+    add_header Content-Security-Policy "script-src 'self'; object-src 'none'; base-uri 'none';" always;
+
+    add_header Referrer-Policy no-referrer;
+
+    add_header X-Frame-Options DENY;
+
+    add_header X-Content-Type-Options nosniff;
+  '';
+
+  config.networking.firewall = {
+    allowedTCPPorts = [ 443 80 ];
+    allowedUDPPorts = [ 443 ];
+  };
+
+  config.services.prometheus.exporters.nginx = enabled {
+    listenAddress = "[::]";
+  };
+
+  config.acmeUsers = [ "nginx" ];
+
+  config.services.nginx = enabled {
+    package = pkgs.nginxQuic;
+
+    statusPage = true;
+
+    recommendedBrotliSettings = true;
+    recommendedGzipSettings   = true;
+    recommendedZstdSettings   = true;
+
+    recommendedOptimisation   = true;
+    recommendedProxySettings  = true;
+    recommendedTlsSettings    = true;
+
+    commonHttpConfig = ''
+      map $scheme $hsts_header {
+        https "max-age=31536000; includeSubdomains; preload";
+      }
+
+      ${config.nginxHeaders}
+
+      proxy_cookie_path / "/; secure; HttpOnly; SameSite=strict";
+    '';
+  };
+}

modules/site.nix

@@ -0,0 +1,60 @@
+{ config, lib, ... }: let
+  inherit (config.networking) domain;
+  inherit (lib) enabled merge;
+
+  sitePath = "/var/www/site";
+
+  notFoundLocationConfig = {
+    extraConfig                  = "error_page 404 /404.html;";
+    locations."/404".extraConfig = "internal;";
+  };
+in {
+  services.nginx = enabled {
+    appendHttpConfig = ''
+      map $http_origin $allow_origin {
+        ~^https://.+\.${domain}$ $http_origin;
+      }
+
+      map $http_origin $allow_methods {
+        ~^https://.+\.${domain}$ "GET, HEAD, OPTIONS";
+      }
+    '';
+
+    virtualHosts.${domain} = merge config.nginxSslTemplate notFoundLocationConfig {
+      root = sitePath;
+
+      locations."/".tryFiles = "$uri $uri.html $uri/index.html =404";
+
+      locations."/assets/".extraConfig = let
+        nginxHeaders' = ''
+          add_header Access-Control-Allow-Origin $allow_origin;
+          add_header Access-Control-Allow-Methods $allow_methods;
+        '';
+      in ''
+        ${config.nginxHeaders}
+        ${nginxHeaders'}
+
+        if ($request_method = OPTIONS) {
+          ${config.nginxHeaders}
+          ${nginxHeaders'}
+          add_header Content-Type text/plain;
+          add_header Content-Length 0;
+          return 204;
+        }
+
+        expires 24h;
+      '';
+    };
+
+    virtualHosts."www.${domain}" = merge config.nginxSslTemplate {
+      locations."/".extraConfig = "return 301 https://${domain}$request_uri;";
+    };
+
+    virtualHosts._ = merge config.nginxSslTemplate notFoundLocationConfig {
+      root = sitePath;
+
+      locations."/".extraConfig        = "return 404;";
+      locations."/assets/".extraConfig = "return 301 https://${domain}$request_uri;";
+    };
+  };
+}