Merge pull request #207 from EduardoPires/pipeline-ajusts .net 9 ajusts

.net 8 migration and refactorings (#201) * .NET 8 * .NET 8 * Setup of Identity without external dependencies * Update README.md * Update dotnet-core.yml

Update Dockerfile 

Migrating to .NET 5 (#180) 

Delete feature_request.md 

Update README.md