An application that runs on one developer’s machine may fail elsewhere because a dependency or operating-system difference was missed. Cloud Native Buildpacks help turn source code into a portable container image: provide the code, choose a builder, and let it assemble the image for a container runtime. section 1.3.6 section 7.2
A build has two stages: detection and building. Detection checks whether the source is recognizable; for a Go application, a builder can identify the project from its module file and find a main package to run. The build then creates the container image. Builders can use the libraries, dependencies, and base images suited to a hosting platform, while retaining the portability of a container. section 7.2 section 7.3 section 7.1
Build and check a Go service locally
Install Docker as the container runtime and pack as the Buildpacks tool. Run `pack builder suggest` to inspect available builders, then build the application with the Google builder. Run `docker run hello-api` and call the service’s translation endpoint to check that it works in its container. section 7.3
pack build hello-api --builder gcr.io/buildpacks/builder:v1
This is the concrete pack command for building the example image with a selected builder. section 7.3
The practical payoff is a repeatable path from local development toward hosted deployment. Buildpacks handle image creation; a container runtime runs the resulting image locally or in production. section 7.3 section 7.9
