Flowtrack: private period tracker with cycle predictions

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.nix

@@ -0,0 +1,26 @@
+{ lib, stdenvNoCC, makeWrapper, python3 }:
+
+stdenvNoCC.mkDerivation {
+  pname = "flowtrack";
+  version = "1.0.0";
+  src = ./.;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/share/flowtrack $out/bin
+    cp app.py $out/share/flowtrack/app.py
+    cp -r static $out/share/flowtrack/static
+    makeWrapper ${python3}/bin/python3 $out/bin/flowtrack \
+      --add-flags "$out/share/flowtrack/app.py"
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Private, self-hosted period tracker with cycle predictions";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
+    mainProgram = "flowtrack";
+  };
+}