create changelog for docker

Author: alphaville

docker/CHANGELOG.md

@@ -0,0 +1,57 @@
+# Changelog
+
+All notable changes to the Docker image in this directory will be documented in this file.
+
+The format is loosely based on Keep a Changelog and tracks changes to the Dockerfile,
+bundled notebooks, and image-facing documentation.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.7.0] - 2026-03-22
+
+### Added
+
+- Added a Rust Jupyter notebook at `docker/notebooks/openrust_basic.ipynb` based on the
+  OpEn basic Rust example.
+- Added a Python Jupyter notebook at `docker/notebooks/python_ocp_1.ipynb` based on the
+  getting-started optimal control example.
+- Added Matplotlib to the image so bundled Python notebooks can plot trajectories.
+- Added Rust kernel support in JupyterLab through `evcxr_jupyter`.
+
+### Changed
+
+- Updated the image to bundle Python 3.12 from `python:3.12-slim-bookworm`.
+- Switched the interactive environment from the classic Jupyter notebook UI to JupyterLab.
+- Moved the example notebook into `docker/notebooks/`.
+- Updated `docker/README.md` and `docs/docker.md` to describe the current image layout,
+  authentication model, kernels, notebook locations, and build flow.
+- Documented the Dockerfile/image version separately from the bundled Python package
+  version.
+
+### Security
+
+- Enabled Jupyter's default token authentication by default instead of disabling auth.
+- Upgraded `pip` in both the system Python and virtual environment during the image build.
+- Removed the transient `py` package from the virtual environment after installing
+  `opengen`.
+
+## [0.6.0] - 2026-03-21
+
+### Changed
+
+- Updated the Docker image version from `0.5.0` to `0.6.0`
+- Updated Python notebook 
+
+## [0.5.0] - 2026-03-21
+
+### Added
+
+- Added maintainer-facing build and publish instructions in `docker/README.md`.
+
+### Changed
+
+- Defined Dockerfile/image version `0.5.0`.
+- Bundled `opengen==0.10.0` in the image while keeping the Docker image version distinct.
+- Reworked notebook packaging so bundled notebooks are copied from `docker/notebooks/`.
+