4d70856b8a
Prior to this commit, docker would look for a container ID based on "Successfully built" string. This output does not exist if a user has enabled the experimental feature buildkit. This commit updates the build behavior to match against both kinds of outputs, and instead of using `scan`, it uses MatchData and groups the container id with match group name `:id` instead of making hard assumptions with the matches being contained inside arrays from scan.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.