docker build fails

[ryanolson]

simple fix to the dockerfile

[cyphar]

Thanks, but we need go-mtree for the tests. I guess I must've dropped it from an openSUSE repo without noticing. I'll fix that up.

[ryanolson]

go-mtree is in the vendor directory, so you include it, just not via the package manager.

[cyphar]

@ryanolson We also use it as a binary, not just as a library. In the tests, we do verification that gomtree succeeds after unpacking and so on.

[cyphar]

This has been fixed in #176. Thanks for your patience, there were a lot of issues to deal with.