should the .NET runtime image include libicu?

[cjdcordeiro]

Since upstream includes it, I think it'd be wise to do as well. Though that'd be a change to Dockerfile.runtime, independent of commits in this PR.

Originally posted by @woky in #7 (comment)

[mthalman]

The libicu package adds a fair amount of size to the resulting image. And its use is optional for .NET apps. We've demonstrated with our .NET Alpine images, which also do not include ICU, that this is a popular offering. Since the purpose of this image type is to reduce things down to only what is necessary, I don't see a need to include an optional component like ICU. As long as there's decent documentation that demonstrates how to install libicu for customers, I think we'd be good.

[cjdcordeiro]

ok thanks for the info. keeping libicu out of it then.