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/exporter/ChangeLog.md

@@ -0,0 +1,110 @@
+# ChangeLog
+
+All notable changes are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
+
+## [5.1.1] - 2023-09-24
+
+### Changed
+
+* [#52](https://github.com/sebastianbergmann/exporter/pull/52): Optimize export of large arrays and object graphs
+
+## [5.1.0] - 2023-09-18
+
+### Changed
+
+* [#51](https://github.com/sebastianbergmann/exporter/pull/51): Export arrays using short array syntax
+
+## [5.0.1] - 2023-09-08
+
+### Fixed
+
+* [#49](https://github.com/sebastianbergmann/exporter/issues/49): `Exporter::toArray()` changes `SplObjectStorage` index
+
+## [5.0.0] - 2023-02-03
+
+### Changed
+
+* [#42](https://github.com/sebastianbergmann/exporter/pull/42): Improve export of enumerations
+
+### Removed
+
+* This component is no longer supported on PHP 7.3, PHP 7.4 and PHP 8.0
+
+## [4.0.5] - 2022-09-14
+
+### Fixed
+
+* [#47](https://github.com/sebastianbergmann/exporter/pull/47): Fix `float` export precision
+
+## [4.0.4] - 2021-11-11
+
+### Changed
+
+* [#37](https://github.com/sebastianbergmann/exporter/pull/37): Improve export of closed resources
+
+## [4.0.3] - 2020-09-28
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.3 || ^8.0` to `>=7.3`
+
+## [4.0.2] - 2020-06-26
+
+### Added
+
+* This component is now supported on PHP 8
+
+## [4.0.1] - 2020-06-15
+
+### Changed
+
+* Tests etc. are now ignored for archive exports
+
+## [4.0.0] - 2020-02-07
+
+### Removed
+
+* This component is no longer supported on PHP 7.0, PHP 7.1, and PHP 7.2
+
+## [3.1.5] - 2022-09-14
+
+### Fixed
+
+* [#47](https://github.com/sebastianbergmann/exporter/pull/47): Fix `float` export precision
+
+## [3.1.4] - 2021-11-11
+
+### Changed
+
+* [#38](https://github.com/sebastianbergmann/exporter/pull/38): Improve export of closed resources
+
+## [3.1.3] - 2020-11-30
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.0` to `>=7.0`
+
+## [3.1.2] - 2019-09-14
+
+### Fixed
+
+* [#29](https://github.com/sebastianbergmann/exporter/pull/29): Second parameter for `str_repeat()` must be an integer
+
+### Removed
+
+* Remove HHVM-specific code that is no longer needed
+
+[5.1.1]: https://github.com/sebastianbergmann/exporter/compare/5.1.0...5.1.1
+[5.1.0]: https://github.com/sebastianbergmann/exporter/compare/5.0.1...5.1.0
+[5.0.1]: https://github.com/sebastianbergmann/exporter/compare/5.0.0...5.0.1
+[5.0.0]: https://github.com/sebastianbergmann/exporter/compare/4.0.5...5.0.0
+[4.0.5]: https://github.com/sebastianbergmann/exporter/compare/4.0.4...4.0.5
+[4.0.4]: https://github.com/sebastianbergmann/exporter/compare/4.0.3...4.0.4
+[4.0.3]: https://github.com/sebastianbergmann/exporter/compare/4.0.2...4.0.3
+[4.0.2]: https://github.com/sebastianbergmann/exporter/compare/4.0.1...4.0.2
+[4.0.1]: https://github.com/sebastianbergmann/exporter/compare/4.0.0...4.0.1
+[4.0.0]: https://github.com/sebastianbergmann/exporter/compare/3.1.2...4.0.0
+[3.1.5]: https://github.com/sebastianbergmann/exporter/compare/3.1.4...3.1.5
+[3.1.4]: https://github.com/sebastianbergmann/exporter/compare/3.1.3...3.1.4
+[3.1.3]: https://github.com/sebastianbergmann/exporter/compare/3.1.2...3.1.3
+[3.1.2]: https://github.com/sebastianbergmann/exporter/compare/3.1.1...3.1.2