Build checks

BuildKit has built-in support for analyzing your build configuration based on a set of pre-defined rules for enforcing Dockerfile and building best practices. Adhering to these rules helps avoid errors and ensures good readability of your Dockerfile.

Checks run as a build invocation, but instead of producing a build output, it performs a series of checks to validate that your build doesn't violate any of the rules. To run a check, use the --check flag:

$ docker build --check .

To learn more about how to use build checks, see Checking your build configuration.