docs/build/dockerfile/release-notes.md

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---
title: Dockerfile release notes
description: Release notes for Dockerfile frontend
keywords: build, dockerfile, frontend, release notes
toc_max: 2
---
This page contains information about the new features, improvements, known
issues, and bug fixes in [Dockerfile reference](../../engine/reference/builder.md).
For usage, see the [Dockerfile frontend syntax](frontend.md) page.
## 1.6.0
{% include release-date.html date="2023-06-13" %}
### New
* Add `--start-interval` flag to the
[`HEALTHCHECK` instruction](../../engine/reference/builder.md#healthcheck).
The following features have graduated from the labs channel to stable:
* The `ADD` instruction can now [import files directly from Git URLs](../../engine/reference/builder.md#adding-a-git-repository-add-git-ref-dir)
* The `ADD` instruction now supports [`--checksum` flag](../../engine/reference/builder.md#verifying-a-remote-file-checksum-add---checksumchecksum-http-src-dest)
to validate the contents of the remote URL contents
### Bug fixes and enhancements
* Variable substitution now supports additional POSIX compatible variants without `:`.
[moby/buildkit#3611](https://github.com/moby/buildkit/pull/3611)
* Exported Windows images now contain OSVersion and OSFeatures values from base image.
[moby/buildkit#3619](https://github.com/moby/buildkit/pull/3619)
* Changed the permissions for Heredocs to 0644.
[moby/buildkit#3992](https://github.com/moby/buildkit/pull/3992)
## 1.5.2
{% include release-date.html date="2023-02-14" %}
### Bug fixes and enhancements
* Fix building from Git reference that is missing branch name but contains a
subdir
* 386 platform image is now included in the release
## 1.5.1
{% include release-date.html date="2023-01-18" %}
### Bug fixes and enhancements
* Fix possible panic when warning conditions appear in multi-platform builds
## 1.5.0 (labs)
{% include release-date.html date="2023-01-10" %}
{% include dockerfile-labs-channel.md %}
### New
* `ADD` command now supports [`--checksum` flag](../../engine/reference/builder.md#verifying-a-remote-file-checksum-add---checksumchecksum-http-src-dest)
to validate the contents of the remote URL contents
## 1.5.0
{% include release-date.html date="2023-01-10" %}
### New
* `ADD` command can now [import files directly from Git URLs](../../engine/reference/builder.md#adding-a-git-repository-add-git-ref-dir)
### Bug fixes and enhancements
* Named contexts now support `oci-layout://` protocol for including images from
local OCI layout structure
* Dockerfile now supports secondary requests for listing all build targets or
printing outline of accepted parameters for a specific build target
* Dockerfile `#syntax` directive that redirects to an external frontend image
now allows the directive to be also set with `//` comments or JSON. The file
may also contain a shebang header
* Named context can now be initialized with an empty scratch image
* Named contexts can now be initialized with an SSH Git URL
* Fix handling of `ONBUILD` when importing Schema1 images
## 1.4.3
{% include release-date.html date="2022-08-23" %}
### Bug fixes and enhancements
* Fix creation timestamp not getting reset when building image from
`docker-image://` named context
* Fix passing `--platform` flag of `FROM` command when loading
`docker-image://` named context
## 1.4.2
{% include release-date.html date="2022-05-06" %}
### Bug fixes and enhancements
* Fix loading certain environment variables from an image passed with built
context
## 1.4.1
{% include release-date.html date="2022-04-08" %}
### Bug fixes and enhancements
* Fix named context resolution for cross-compilation cases from input when input
is built for a different platform
## 1.4.0
{% include release-date.html date="2022-03-09" %}
### New
* [`COPY --link` and `ADD --link`](../../engine/reference/builder.md#copy---link)
allow copying files with increased cache efficiency and rebase images without
requiring them to be rebuilt. `--link` copies files to a separate layer and
then uses new LLB MergeOp implementation to chain independent layers together
* [Heredocs](../../engine/reference/builder.md#here-documents) support have
been promoted from labs channel to stable. This feature allows writing
multiline inline scripts and files
* Additional [named build contexts](../../engine/reference/commandline/buildx_build.md#build-context)
can be passed to build to add or overwrite a stage or an image inside the
build. A source for the context can be a local source, image, Git, or HTTP URL
* [`BUILDKIT_SANDBOX_HOSTNAME` build-arg](../../engine/reference/builder.md#buildkit-built-in-build-args)
can be used to set the default hostname for the `RUN` steps
### Bug fixes and enhancements
* When using a cross-compilation stage, the target platform for a step is now
seen on progress output
* Fix some cases where Heredocs incorrectly removed quotes from content
## 1.3.1
{% include release-date.html date="2021-10-04" %}
### Bug fixes and enhancements
* Fix parsing "required" mount key without a value
## 1.3.0 (labs)
{% include release-date.html date="2021-07-16" %}
{% include dockerfile-labs-channel.md %}
### New
* `RUN` and `COPY` commands now support [Here-document syntax](../../engine/reference/builder.md#here-documents)
allowing writing multiline inline scripts and files
## 1.3.0
{% include release-date.html date="2021-07-16" %}
### New
* `RUN` command allows [`--network` flag](../../engine/reference/builder.md#run---network)
for requesting a specific type of network conditions. `--network=host`
requires allowing `network.host` entitlement. This feature was previously
only available on labs channel
### Bug fixes and enhancements
* `ADD` command with a remote URL input now correctly handles the `--chmod` flag
* Values for [`RUN --mount` flag](../../engine/reference/builder.md#run---mount)
now support variable expansion, except for the `from` field
* Allow [`BUILDKIT_MULTI_PLATFORM` build arg](../../engine/reference/builder.md#buildkit-built-in-build-args)
to force always creating multi-platform image, even if only contains single
platform
## 1.2.1 (labs)
{% include release-date.html date="2020-12-12" %}
{% include dockerfile-labs-channel.md %}
### Bug fixes and enhancements
* `RUN` command allows [`--network` flag](../../engine/reference/builder.md#run---network)
for requesting a specific type of network conditions. `--network=host`
requires allowing `network.host` entitlement
## 1.2.1
{% include release-date.html date="2020-12-12" %}
### Bug fixes and enhancements
* Revert "Ensure ENTRYPOINT command has at least one argument"
* Optimize processing `COPY` calls on multi-platform cross-compilation builds
## 1.2.0 (labs)
{% include release-date.html date="2020-12-03" %}
{% include dockerfile-labs-channel.md %}
### Bug fixes and enhancements
* Experimental channel has been renamed to *labs*
## 1.2.0
{% include release-date.html date="2020-12-03" %}
### New
* [`RUN --mount` syntax](../../engine/reference/builder.md#run---mount) for
creating secret, ssh, bind, and cache mounts have been moved to mainline
channel
* [`ARG` command](../../engine/reference/builder.md#arg) now supports defining
multiple build args on the same line similarly to `ENV`
### Bug fixes and enhancements
* Metadata load errors are now handled as fatal to avoid incorrect build results
* Allow lowercase Dockerfile name
* `--chown` flag in `ADD` now allows parameter expansion
* `ENTRYPOINT` requires at least one argument to avoid creating broken images
## 1.1.7
{% include release-date.html date="2020-04-18" %}
### Bug fixes and enhancements
* Forward `FrontendInputs` to the gateway
## 1.1.2 (experimental)
{% include release-date.html date="2019-07-31" %}
{% include dockerfile-labs-channel.md %}
### Bug fixes and enhancements
* Allow setting security mode for a process with `RUN --security=sandbox|insecure`
* Allow setting uid/gid for [cache mounts](../../engine/reference/builder.md#run---mounttypecache)
* Avoid requesting internally linked paths to be pulled to build context
* Ensure missing cache IDs default to target paths
* Allow setting namespace for cache mounts with [`BUILDKIT_CACHE_MOUNT_NS` build arg](../../engine/reference/builder.md#buildkit-built-in-build-args)
## 1.1.2
{% include release-date.html date="2019-07-31" %}
### Bug fixes and enhancements
* Fix workdir creation with correct user and don't reset custom ownership
* Fix handling empty build args also used as `ENV`
* Detect circular dependencies
## 1.1.0
{% include release-date.html date="2019-04-27" %}
### New
* `ADD/COPY` commands now support implementation based on `llb.FileOp` and do
not require helper image if builtin file operations support is available
* `--chown` flag for `COPY` command now supports variable expansion
### Bug fixes and enhancements
* To find the files ignored from the build context Dockerfile frontend will
first look for a file `<path/to/Dockerfile>.dockerignore` and if it is not
found `.dockerignore` file will be looked up from the root of the build
context. This allows projects with multiple Dockerfiles to use different
`.dockerignore` definitions