Let's see if I can build cinny from source

nixos/server/package-configs/cinny/default.nix

@@ -4,40 +4,18 @@
   inputs,
   lib,
   ...
-}: let
-  port = 2143;
-  configFile =
-    pkgs.writeText "config.json"
-    ''
-      {
-          "defaultHomeserver": 0,
-          "homeserverList": [
-              "matrix.gladtherescake.eu"
-          ],
-          "allowCustomHomeservers": false
-      }
-    '';
-in {
-  virtualisation.oci-containers.containers."cinny" = {
-    autoStart = true;
-    ports = ["${toString port}:80"];
-    volumes = [
-      "${configFile}:/app/config.json"
-    ];
-    image = "ajbura/cinny:latest";
-  };
-
+}: {
   services.nginx = {
     enable = true;
     virtualHosts = {
       "cinny.gladtherescake.eu" = {
+        root = "${pkgs.cinny}";
         ## Force HTTP redirect to HTTPS
         forceSSL = true;
         ## LetsEncrypt
         enableACME = true;
         locations."/" = {
-          proxyPass = "http://localhost:${toString port}";
-          proxyWebsockets = true;
+          index = "index.html";
         };
       };
     };

pkgs/cinny/default.nix

@@ -0,0 +1,50 @@
+{
+  lib,
+  buildNpmPackage,
+  fetchFromGitHub,
+  pkgs,
+}: let
+  port = 2143;
+  configFile =
+    pkgs.writeText "config.json"
+    ''
+      {
+          "defaultHomeserver": 0,
+          "homeserverList": [
+              "matrix.gladtherescake.eu"
+          ],
+          "allowCustomHomeservers": false
+      }
+    '';
+in
+  buildNpmPackage rec {
+    pname = "cinny";
+    version = "09a0a2d";
+
+    src = fetchFromGitHub {
+      owner = "cinnyapp";
+      repo = pname;
+      rev = "${version}";
+      hash = "sha256-ee8YOJ0fGy26OWXb2Uumzy68M4UpERHH3ni0q+tDY14=";
+    };
+
+    npmDepsHash = "sha256-zelk15/rXXjhWuHj1GsSevnyXVBeDkMJ0qZfPyejq4A=";
+
+    # The prepack script runs the build script, which we'd rather do in the build phase.
+    npmPackFlags = ["--ignore-scripts" "--max_old_space_size=4096"];
+
+    installPhase = ''
+      mkdir $out
+      npm run build
+      cp -r dist/* $out
+      mkdir $out/app
+      cp ${configFile} $out/app/config.json
+    '';
+
+    meta = with lib; {
+      description = "Yet another matrix client";
+      homepage = "https://cinny.in/";
+      license = licenses.agpl3O;
+      maintainers = with maintainers; [Lillian-Violet];
+    };
+  }