add .vagrant to .dockerignore
add .vagrant to .dockerignore

alexdebrie/pachyderm,ShengjieLuo/pachyderm,wideioltd/pachyderm,pachyderm/pfs,ShengjieLuo/pachyderm,kunthar/pachyderm,wideioltd/pachyderm,sambooo/pachyderm,phacops/pachyderm,kunthar/pachyderm,pachyderm/pfs,alexdebrie/pachyderm,klucar/pachyderm,klucar/pachyderm,henrylee2cn/pachyderm,alexdebrie/pachyderm,sambooo/pachyderm,klucar/pachyderm,henrylee2cn/pachyderm,sambooo/pachyderm,ShengjieLuo/pachyderm,phacops/pachyderm,pachyderm/pfs