Add a publish task to handle setting the target runtime environment to linux-x64 (docs) and the configuration to Release.
Add a publish task to handle setting the target runtime environment to `linux-x64` ([docs](https://docs.microsoft.com/en-us/dotnet/core/deploying/deploy-with-cli#framework-dependent-executable)) and the configuration to `Release`.
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.NET Core 2.2 goes end-of-life 23 Dec 19.
Add a publish task to handle setting the target runtime environment to
linux-x64(docs) and the configuration toRelease.