$Profit

//empty publish folder then...
dotnet publish -c Release -o ./../publish/ --no-self-contained -r linux-x64

backup last contact in contact.last folder
remove all files from contact.last
then  cp -a ../contact/. .

copy up to server
.NET Core apps: /srv/coreapps/contact

, then to restart the service do restart:
systemctl restart kestrel-contact.service
systemctl status kestrel-contact.service
systemctl start kestrel-contact.service
systemctl stop kestrel-contact.service