Usage

# syntax=docker.io/docker/dockerfile:1.9

Notable changes

• Add new validation rules: SecretsUsedInArgOrEnv, InvalidDefaultArgInFrom, RedundantTargetPlatform, CopyIgnoredFile (experimental) and FromPlatformFlagConstDisallowed #5135 #5140 #5105 #5113 #5091 #5094 #5090 #5046
• Many performance improvements for working with big Dockerfiles #5067 #5029
• Fix possible panic when building Dockerfile without defined stages #5150
• Fix incorrect JSON parsing that could cause some incorrect JSON values to pass without producing an error #5107
• Fix issue where COPY --link to . destination path could fail (regression from v1.8+) #5080
• Fix validation of ADD --checksum when used with a Git URL #5085