add troubleshooting to toc, update mkdocs meta (#641)
add troubleshooting to toc, update mkdocs meta (#641)

Merging in because the changes were clearly testable and we had two approvals. I'll close out the parent issue #630 after this. Thanks, @tannerjfco!
rfay/ddev,drud/ddev,rfay/ddev,rfay/ddev,rfay/ddev,drud/ddev,drud/ddev,drud/ddev,rfay/ddev,drud/ddev