enhancement: notify if installing on Alpine

[mefellows]

Alpine is not officially supported, and is fraught with problems due to its use of musl over glibc.

See also https://github.com/pact-foundation/pact-net/issues/387#issuecomment-1114365283.

If we can detect the alpine OS at pact-go install (or other CLI calls) we could print out a notice warning users of potential issues.