Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/vendor/league/config/CHANGELOG.md

@@ -0,0 +1,42 @@
+# Change Log
+All notable changes to this project will be documented in this file.
+Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
+
+## [Unreleased][unreleased]
+
+## [1.2.0] - 2022-12-11
+
+### Changed
+
+- Values can now be set prior to the corresponding schema being registered.
+- `exists()` and `get()` now only trigger validation for the relevant schema, not the entire config at once.
+
+## [1.1.1] - 2021-08-14
+
+### Changed
+
+ - Bumped the minimum version of dflydev/dot-access-data for PHP 8.1 support
+
+## [1.1.0] - 2021-06-19
+
+### Changed
+
+- Bumped the minimum PHP version to 7.4+
+- Bumped the minimum version of nette/schema to 1.2.0
+
+## [1.0.1] - 2021-05-31
+
+### Fixed
+
+- Fixed the `ConfigurationExceptionInterface` marker interface not extending `Throwable` (#2)
+
+## [1.0.0] - 2021-05-31
+
+Initial release! 🎉
+
+[unreleased]: https://github.com/thephpleague/config/compare/v1.2.0...main
+[1.2.0]: https://github.com/thephpleague/config/compare/v1.1.1...v.1.2.0
+[1.1.1]: https://github.com/thephpleague/config/compare/v1.1.0...v1.1.1
+[1.1.0]: https://github.com/thephpleague/config/compare/v1.0.1...v1.1.0
+[1.0.1]: https://github.com/thephpleague/config/compare/v1.0.0...v1.0.1
+[1.0.0]: https://github.com/thephpleague/config/releases/tag/v1.0.0