Add gitignore and README skeleton

.gitignore

@@ -0,0 +1,28 @@
+# .NET
+bin/
+obj/
+*.user
+*.suo
+.vs/
+
+# ASP.NET local secrets
+backend/appsettings.Development.json
+backend/appsettings.Local.json
+
+# Node
+node_modules/
+dist/
+.vite/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Editor / OS
+.idea/
+.vscode/
+.DS_Store
+
+# Frontend env
+frontend/.env
+frontend/.env.local
+frontend/.env.*.local

README.md

@@ -1,2 +1,7 @@
-# SupabaseTest
+# supabase_test
 
+Minimal to-do list. React (Vite+TypeScript) frontend, ASP.NET Core Web API backend, Supabase for auth and Postgres.
+
+See [`docs/superpowers/specs/2026-08-15-supabase-todo-app-design.md`](docs/superpowers/specs/2026-08-15-supabase-todo-app-design.md) for the design.
+
+Setup instructions land here after the app is wired up.