Adding "document_root" property for projects where "root" is not the exposed web root, and refactor templates to use that property instead.

Load server_config_path from config yml, if empty, generate it dynamically from provision config_path and server name.

In DbMysqlDockerService, detect the error message about docker client unable to connect. Bail if found, informing the user.

Update ServerContext::shell_exec() to save output and error to temporary files. Makes for much more control over what we do with the results.

Make sure verbose task status indicators don't run for "logging" tasks (those are only for the titles that group services.)

This reverts commit 80e5aa40.