Added vitest | added dockerfile | wrote some tests

pac-man-board-game/Dockerfile

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+FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+
+# Install Node.js TODO use node 18?
+RUN curl -fsSL https://deb.nodesource.com/setup_14.x | bash - \
+    && apt-get install -y \
+        nodejs \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /src
+COPY ["pac-man-board-game/pac-man-board-game.csproj", "pac-man-board-game/"]
+RUN dotnet restore "pac-man-board-game/pac-man-board-game.csproj"
+COPY . .
+WORKDIR "/src/pac-man-board-game"
+# TODO missing build files from frontend
+RUN dotnet build "pac-man-board-game.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "pac-man-board-game.csproj" -c Release -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "pac-man-board-game.dll"]