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/sebastian/complexity/ChangeLog.md

@@ -0,0 +1,68 @@
+# ChangeLog
+
+All notable changes are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
+
+## [3.2.0] - 2023-12-21
+
+### Added
+
+* `ComplexityCollection::sortByDescendingCyclomaticComplexity()`
+
+### Changed
+
+* This component is now compatible with `nikic/php-parser` 5.0
+
+## [3.1.0] - 2023-09-28
+
+### Added
+
+* `Complexity::isFunction()` and `Complexity::isMethod()`
+* `ComplexityCollection::isFunction()` and `ComplexityCollection::isMethod()`
+* `ComplexityCollection::mergeWith()`
+
+### Fixed
+
+* Anonymous classes are not processed correctly
+
+## [3.0.1] - 2023-08-31
+
+### Fixed
+
+* [#7](https://github.com/sebastianbergmann/complexity/pull/7): `ComplexityCalculatingVisitor` tries to process interface methods
+
+## [3.0.0] - 2023-02-03
+
+### Removed
+
+* This component is no longer supported on PHP 7.3, PHP 7.4 and PHP 8.0
+
+## [2.0.2] - 2020-10-26
+
+### Fixed
+
+* `SebastianBergmann\Complexity\Exception` now correctly extends `\Throwable`
+
+## [2.0.1] - 2020-09-28
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.3 || ^8.0` to `>=7.3`
+
+## [2.0.0] - 2020-07-25
+
+### Removed
+
+* The `ParentConnectingVisitor` has been removed (it should have been marked as `@internal`)
+
+## [1.0.0] - 2020-07-22
+
+* Initial release
+
+[3.2.0]: https://github.com/sebastianbergmann/complexity/compare/3.1.0...3.2.0
+[3.1.0]: https://github.com/sebastianbergmann/complexity/compare/3.0.1...3.1.0
+[3.0.1]: https://github.com/sebastianbergmann/complexity/compare/3.0.0...3.0.1
+[3.0.0]: https://github.com/sebastianbergmann/complexity/compare/2.0.2...3.0.0
+[2.0.2]: https://github.com/sebastianbergmann/complexity/compare/2.0.1...2.0.2
+[2.0.1]: https://github.com/sebastianbergmann/complexity/compare/2.0.0...2.0.1
+[2.0.0]: https://github.com/sebastianbergmann/complexity/compare/1.0.0...2.0.0
+[1.0.0]: https://github.com/sebastianbergmann/complexity/compare/70ee0ad32d9e2be3f85beffa3e2eb474193f2487...1.0.0