health-probes dotnet app fails to start with framework version mismatch

[a-abella]

For 3 Application Observability and Maintenance/3 Implementing Probes and Health Checks/health-probes/dockerfile:

You must install or update .NET to run this application.

App: /app/health-probes.dll
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '7.0.0' (x64)
.NET location: /usr/share/dotnet/

The following frameworks were found:
  8.0.6 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=7.0.0&arch=x64&rid=linux-x64&os=debian.12

Workaround: pin the following image versions in the dockerfile:

• FROM mcr.microsoft.com/dotnet/aspnet AS base -> FROM mcr.microsoft.com/dotnet/aspnet:7.0.0 AS base
• FROM mcr.microsoft.com/dotnet/sdk AS build -> FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build

[arunv84]

Also, I am using Docker and WSL. I got this error when deploying kubernetes: Syntax error: EOF in backquote substitution

This was due to backquotes at the last line in dockerfile: ENTRYPOINT ["dotnet", "health-probes.dll"]```

Removing ``` and recreating the oci image fixed the problem.