Dj Walker-Morgan has introduced a new feature in flyctl that allows users to build and deploy NodeJS, Rails, Go, and Java applications on the Fly platform with just two commands. This feature utilizes support for Cloud Native Buildpacks from the buildpacks.io project. The new Buildpack system is an evolution of existing Buildpack systems from Heroku and Cloud Foundry, designed to be used by different platforms. Currently, there are Cloud Native Buildpacks that support building Rails, NodeJS, Go, and Java applications with Ubuntu, Alpine, or distroless stacks. The new Buildpack support complements flyctl's existing support of Dockerfiles for building deployment images.