project/plugins.sbt (4 lines of code) (raw):
addSbtPlugin("org.playframework" % "sbt-plugin" % "3.0.2")
addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.0.0")
addSbtPlugin("com.github.sbt" % "sbt-native-packager" % "1.9.16")
addDependencyTreePlugin