fix(docs): update links to Docker documentation
docs(installing_docs): add cluster size to system requirements
Merge pull request #2471 from mboersma/fix-dockerfile-ref-link

fix(docs): update links to Docker documentation
Merge pull request #2472 from carmstrong/clarify_resouce_requirements

docs(installing_docs): add cluster size to system requirements
docs(installing_deis): add deisctl version check
Merge pull request #2486 from gabrtv/deisctl-version-check

docs(installing_deis): add deisctl version check
docs(concepts): add missing word
Merge pull request #2476 from misfo/patch-1

Add omitted word in docs
fix(client): _logger doesn't exist for settings
Merge pull request #2493 from Joshua-Anderson/ioerror-fix

fix(client): _logger doesn't exist for settings