Add dockerfile

Dockerfile

+FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
+
+WORKDIR /app
+
+EXPOSE 80
+
+FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
+
+WORKDIR /src
+
+COPY ["gRPCServer/SpotifyService.csproj", "gRPCServer/SpotifyService/"]
+
+COPY ["IdentityProvider/IdentityProvider.csproj", "IdentityProvider/IdentityProvider/"]
+
+COPY ["NemAnCore/NemAnBlazor.csproj", "NemAnCore/NemAnBlazor/"]
+
+COPY ["SpotifyWorker/SpotifyWorker.csproj", "SpotifyWorker/SpotifyWorker/"]
+
+COPY *.sln .
+
+COPY *.csproj ./
+
+RUN dotnet restore "gRPCServer/SpotifyService.csproj"
+
+RUN dotnet restore "IdentityProvider/IdentityProvider.csproj"
+
+RUN dotnet restore "NemAnCore/NemAnBlazor.csproj"
+
+RUN dotnet restore "SpotifyWorker/SpotifyWorker.csproj"
+
+COPY . .
+
+WORKDIR "/src/gRPCServer/SpotifyService"
+
+RUN dotnet build "SpotifyService.csproj" -c Release -o /app/build
+
+COPY . .
+
+WORKDIR "/src/IdentityProvider/IdentityProvider"
+
+RUN dotnet build "IdentityProvider.csproj" -c Release -o /app/build1
+
+COPY . .
+
+WORKDIR "/src/NemAnCore/NemAnBlazor"
+
+RUN dotnet build "NemAnBlazor.csproj" -c Release -o /app/build2
+
+COPY . .
+
+WORKDIR "/src/SpotifyWorker/SpotifyWorker"
+
+RUN dotnet build "SpotifyWorker.csproj" -c Release -o /app/build3
+
+FROM build AS publish
+
+RUN dotnet publish -c Release -o /app/publish "/src/gRPCServer/SpotifyService.csproj"
+
+RUN dotnet publish -c Release -o /app/publish1 "/src/IdentityProvider/IdentityProvider.csproj"
+
+RUN dotnet publish -c Release -o /app/publish2 "/src/NemAnCore/NemAnBlazor.csproj"
+
+RUN dotnet publish -c Release -o /app/publish3 "/src/SpotifyWorker/SpotifyWorker.csproj"
+
+FROM base AS final
+
+WORKDIR /app
+
+COPY --from=publish /app/publish .
+
+ENTRYPOINT ["dotnet", "SpotifyService.dll"]
+
+COPY --from=publish /app/publish1 .
+
+ENTRYPOINT ["dotnet", "IdentityProvider.dll"]
+
+COPY --from=publish /app/publish2 .
+
+ENTRYPOINT ["dotnet", "NemAnBlazor.dll"]
+
+COPY --from=publish /app/publish3 .
+
+ENTRYPOINT ["dotnet", "SpotifyWorker.dll"]