Visual Studio Docker support for .NET 5/6

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Description

Visual Studio now offers a simple way to support Docker in a project. It automatically creates a Dockerfile, which then creates the Docker container and automatically publishes your application to it.

By default, the base Docker image for a .NET 5 or .NET 6 application is a Windows Nano Server Docker image with the appropriate framework. However, this is a very lightweight operating system designed to run native cloud applications. It lacks almost the entire Windows API (e.g. GDI+), which is mandatory for List & Label. Therefore, the Windows Server Core Docker image must be used for List & Label. The following Docker files use the Windows Server Core 2019 Docker image.

Dockerfile

.NET 5

FROM mcr.microsoft.com/dotnet/aspnet:5.0-windowsservercore-ltsc2019 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/aspnet:5.0-windowsservercore-ltsc2019 AS build
WORKDIR /src
COPY ["WebApplication/WebApplication.csproj", "WebApplication/"]
RUN dotnet restore "WebApplication/WebApplication.csproj"
COPY . .
WORKDIR "/src/WebApplication"
RUN dotnet build "WebApplication.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "WebApplication.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "WebApplication.dll"]

.NET 6

FROM mcr.microsoft.com/dotnet/aspnet:6.0-windowsservercore-ltsc2019 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/aspnet:6.0-windowsservercore-ltsc2019 AS build
WORKDIR /src
COPY ["WebApplication/WebApplication.csproj", "WebApplication/"]
RUN dotnet restore "WebApplication/WebApplication.csproj"
COPY . .
WORKDIR "/src/WebApplication"
RUN dotnet build "WebApplication.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "WebApplication.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "WebApplication.dll"]

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