feat: install owntracks frontend

modules/nixos/features/owntracks-frontend.nix

@@ -0,0 +1,32 @@
+{
+  stdenv,
+  writeText,
+  fetchzip,
+}:
+stdenv.mkDerivation {
+  pname = "owntracks-frontend";
+  version = "v2.15.3";
+  src = fetchzip {
+    url = "https://github.com/owntracks/frontend/releases/download/v2.15.3/v2.15.3-dist.zip";
+    sha256 = "iy+yISPcOD/2lTyJUb1eI3wufLku1mKfVDm0+Dy8OKk=";
+  };
+
+  config = writeText "config.js" ''
+    window.owntracks = window.owntracks || {};
+    window.owntracks.config = {
+      api: {
+        baseUrl: "https://owntracks.fi33.buzz:5014"
+      },
+      router: {
+        basePath: "owntracks"
+      }
+    };
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    cp -r . $out
+    cp $config $out/config/config.js
+    runHook postInstall
+  '';
+}