Add project files

T120B165-ImgBoard/Dockerfile

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+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
+USER $APP_UID
+WORKDIR /app
+EXPOSE 8080
+EXPOSE 8081
+
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+ARG BUILD_CONFIGURATION=Release
+WORKDIR /src
+COPY ["T120B165-ImgBoard/T120B165-ImgBoard.csproj", "T120B165-ImgBoard/"]
+RUN dotnet restore "T120B165-ImgBoard/T120B165-ImgBoard.csproj"
+COPY . .
+WORKDIR "/src/T120B165-ImgBoard"
+RUN dotnet build "./T120B165-ImgBoard.csproj" -c $BUILD_CONFIGURATION -o /app/build
+
+FROM build AS publish
+ARG BUILD_CONFIGURATION=Release
+RUN dotnet publish "./T120B165-ImgBoard.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+RUN mkdir -p /app/Storage && chown -R app:app /app/Storage
+VOLUME /app/Storage
+ENTRYPOINT ["dotnet", "T120B165-ImgBoard.dll"]