modularize cinny and ente-auth, add package ente-auth-web

The previous was more of a workaround not fitting in the spirit of
nixos, this fixes this and makes proper modules out of them. Sadly
ente-web-auth has to be build with a env var and therefore can't be
configured before properly.

modules/nixos/services/cinny/default.nix

@@ -0,0 +1,64 @@
+{
+  lib,
+  pkgs,
+  config,
+  namespace,
+  ...
+}:
+with lib;
+with lib.${namespace};
+let
+  cfg = config.${namespace}.services.cinny;
+in
+{
+  options.${namespace}.services.cinny = {
+    enable = mkEnableOption "Cinny";
+
+    package = mkOption {
+      description = "The package of Cinny to use.";
+      type = types.package;
+      default = pkgs.cinny-unwrapped;
+    };
+
+    port = mkOption {
+      description = "The port to serve Cinny on.";
+      type = types.nullOr types.int;
+      default = 8686;
+    };
+
+  };
+  config = mkIf cfg.enable {
+    networking.firewall.allowedTCPPorts = [
+      cfg.port
+    ];
+
+    services.caddy = {
+      enable = true;
+      virtualHosts.":${builtins.toString cfg.port}" = {
+        extraConfig = ''
+          root * ${cfg.package}
+          file_server
+
+          @index {
+            not path /index.html
+            not path /public/*
+            not path /assets/*
+
+            not path /config.json
+
+            not path /manifest.json
+            not path /sw.js
+
+            not path /pdf.worker.min.js
+            not path /olm.wasm
+
+            path /*
+          }
+
+          rewrite /*/olm.wasm /olm.wasm
+          rewrite @index /index.html
+        '';
+      };
+    };
+  };
+}