nixos/meme-bingo-web: init service

nixos/modules/module-list.nix

@@ -1250,6 +1250,7 @@
   ./services/web-apps/matomo.nix
   ./services/web-apps/mattermost.nix
   ./services/web-apps/mediawiki.nix
+  ./services/web-apps/meme-bingo-web.nix
   ./services/web-apps/miniflux.nix
   ./services/web-apps/monica.nix
   ./services/web-apps/moodle.nix

nixos/modules/services/web-apps/meme-bingo-web.nix

@@ -0,0 +1,93 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption mdDoc types literalExpression;
+
+  cfg = config.services.meme-bingo-web;
+in {
+  options = {
+    services.meme-bingo-web = {
+      enable = mkEnableOption (mdDoc ''
+        A web app for the meme bingo, rendered entirely on the web server and made interactive with forms.
+
+        Note: The application's author suppose to run meme-bingo-web behind a reverse proxy for SSL and HTTP/3.
+      '');
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.meme-bingo-web;
+        defaultText = literalExpression "pkgs.meme-bingo-web";
+        description = mdDoc "meme-bingo-web package to use.";
+      };
+
+      baseUrl = mkOption {
+        description = mdDoc ''
+          URL to be used for the HTML <base> element on all HTML routes.
+        '';
+        type = types.str;
+        default = "http://localhost:41678/";
+        example = "https://bingo.example.com/";
+      };
+      port = mkOption {
+        description = mdDoc ''
+          Port to be used for the web server.
+        '';
+        type = types.port;
+        default = 41678;
+        example = 21035;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.meme-bingo-web = {
+      description = "A web app for playing meme bingos.";
+      wantedBy = [ "multi-user.target" ];
+
+      environment = {
+        MEME_BINGO_BASE = cfg.baseUrl;
+        MEME_BINGO_PORT = toString cfg.port;
+      };
+      path = [ cfg.package ];
+
+      serviceConfig = {
+        User = "meme-bingo-web";
+        Group = "meme-bingo-web";
+
+        DynamicUser = true;
+
+        ExecStart = "${cfg.package}/bin/meme-bingo-web";
+
+        Restart = "always";
+        RestartSec = 1;
+
+        # Hardening
+        CapabilityBoundingSet = [ "" ];
+        DeviceAllow = [ "/dev/random" ];
+        LockPersonality = true;
+        PrivateDevices = true;
+        PrivateUsers = true;
+        ProcSubset = "pid";
+        ProtectSystem = "strict";
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectProc = "invisible";
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = [ "@system-service" "~@privileged" "~@resources" ];
+        UMask = "0077";
+        RestrictSUIDSGID = true;
+        RemoveIPC = true;
+        NoNewPrivileges = true;
+        MemoryDenyWriteExecute = true;
+      };
+    };
+  };
+}