v4.0.0

heroku/ruby

Changed

• Default process types defined by the Ruby buildpack now use IPv6 host :: which is equivalent of IPv4 host 0.0.0.0. This will only affect applications that do not define a web process type via the Procfile and Procfile Cloud Native Buildpack. Those applications must make sure to update their configuration to bind to an IPv6 host. (#354)

Added

• The buildpack now warns the user when environmental variables used in running the default process are not defined. (#307)