Bake

Bake is a feature of Docker Buildx that lets you define your build configuration using a declarative file, as opposed to specifying a complex CLI expression. It also lets you run multiple builds concurrently with a single invocation.

A Bake file can be written in HCL or JSON format. Bake can also build directly from a Docker Compose file. Here's an example Bake file in HCL format:

```hcl {title=docker-bake.hcl} group "default" { targets = ["frontend", "backend"] }

target "frontend" { context = "./frontend" dockerfile = "frontend.Dockerfile" args = { NODE_VERSION = "22" } tags = ["myapp/frontend:latest"] }

target "backend" { context = "./backend" dockerfile = "backend.Dockerfile" args = { GO_VERSION = "{{% param "example_go_version" %}}" } tags = ["myapp/backend:latest"] }

The `group` block defines a group of targets that can be built concurrently.
Each `target` block defines a build target with its own configuration, such as
the build context, Dockerfile, and tags.

To invoke a build using the above Bake file, you can run:

```console
$ docker buildx bake

This executes the default group, which builds the frontend and backend targets concurrently.

Get started#

To learn how to get started with Bake, head over to the Bake introduction.