Build fails due to `go get` changes

[mtompkins]

Specifically:

go: go.mod file not found in current directory or any parent directory.
        'go get' is no longer supported outside a module.
        To build and install a command, use 'go install' with a version,
        like 'go install example.com/cmd@latest'
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.

[faultoverload]

This has been fixed in this commit.

https://github.com/harleylang/hydroxide-docker/pull/23/commits/251304851bb4a6df0ad2b2d6b3d390a9d3886e30