The maintainers are generally available in Slack at
https://cloud-native.slack.com/messages/flagger/ (obtain an invitation
at https://slack.cncf.io/).

Stefan Prodan, Weaveworks <stefan@weave.works> (Slack: @stefan Twitter: @stefanprodan)
Takeshi Yoneda, DMM.com <cz.rk.t0415y.g@gmail.com> (Slack: @mathetake Twitter: @mathetake)
