[cloud-kubernetes-aspnetcore]:wrong dotnet SDK version

[kozuejpg]

When I run docker build command, I met error.

[+] Building 1.5s (11/15)                                                      docker:default
 => [internal] load build definition from Dockerfile                                     0.0s
 => => transferring dockerfile: 836B                                                     0.0s
 => [internal] load metadata for mcr.microsoft.com/dotnet/aspnet:6.0-alpine-amd64        0.3s
 => [internal] load metadata for mcr.microsoft.com/dotnet/sdk:6.0-alpine                 0.3s
 => [internal] load .dockerignore                                                        0.0s
 => => transferring context: 2B                                                          0.0s
 => [build 1/7] FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine@sha256:f8a27715995b21ff0e7  0.0s
 => [runtime 1/3] FROM mcr.microsoft.com/dotnet/aspnet:6.0-alpine-amd64@sha256:eceeb165  0.0s
 => [internal] load build context                                                        0.0s
 => => transferring context: 10.13kB                                                     0.0s
 => CACHED [runtime 2/3] WORKDIR /app                                                    0.0s
 => CACHED [build 2/7] WORKDIR /app                                                      0.0s
 => CACHED [build 3/7] COPY *.csproj ./                                                  0.0s
 => ERROR [build 4/7] RUN dotnet restore                                                 1.1s
------                                                                                        
 > [build 4/7] RUN dotnet restore:
0.997   Determining projects to restore...
1.010 /usr/share/dotnet/sdk/6.0.427/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 8.0.  Either target .NET 6.0 or lower, or use a version of the .NET SDK that supports .NET 8.0. [/app/HelloWorldAspNetCore.csproj]
------

 1 warning found (use docker --debug to expand):
 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 25)
Dockerfile:9
--------------------
   7 |     # Copy csproj and restore as distinct layers.
   8 |     COPY *.csproj ./
   9 | >>> RUN dotnet restore
  10 |     
  11 |     # Copy local code to the container image.
--------------------
ERROR: failed to solve: process "/bin/sh -c dotnet restore" did not complete successfully: exit code: 1

I fixed Dockerfile and completed build.
FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine AS build
↓
FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build

FROM mcr.microsoft.com/dotnet/aspnet:6.0-alpine-amd64 AS runtime
↓
FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine-amd64 AS runtime