Initial build: WishNinja self-hosted gift wishlist manager

ASP.NET Core Blazor (.NET 10) + EF Core/SQLite + Identity. Features:
- Wishlists & items with local image storage (upload, clipboard paste,
  or URL fetched and stored locally)
- Owner-hidden claims (enforced at the query layer) to preserve surprises
- Admin-invite-only onboarding with email-based password resets
- All state under /data; ships as a single Docker image

Includes Dockerfile, docker-compose, Gitea Actions CI (test + push image),
Unraid template, and xUnit tests (claim privacy, invite lifecycle, image validation).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

Dockerfile

@@ -0,0 +1,27 @@
+# ---- Build stage: compile and publish with the full SDK ----
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+# Restore first (cached unless the project file changes).
+COPY src/WishNinja/WishNinja.csproj src/WishNinja/
+RUN dotnet restore src/WishNinja/WishNinja.csproj
+
+# Build + publish.
+COPY src/ src/
+RUN dotnet publish src/WishNinja/WishNinja.csproj -c Release -o /app /p:UseAppHost=false
+
+# ---- Runtime stage: ship only the ASP.NET Core runtime ----
+FROM mcr.microsoft.com/dotnet/aspnet:10.0 AS final
+WORKDIR /app
+
+# Listen on 8080 (no TLS — terminate TLS at your reverse proxy) and keep all
+# mutable state under /data so a single volume persists db, uploads and keys.
+ENV ASPNETCORE_HTTP_PORTS=8080 \
+    WishNinja__DataPath=/data
+
+RUN mkdir -p /data
+VOLUME /data
+EXPOSE 8080
+
+COPY --from=build /app .
+ENTRYPOINT ["dotnet", "WishNinja.dll"]