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/phar-io/manifest/CHANGELOG.md

@@ -0,0 +1,36 @@
+# Changelog
+
+All notable changes to phar-io/manifest are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
+
+## [2.0.3] - 20.07.2021
+
+- Fixed PHP 7.2 / PHP 7.3 incompatibility introduced in previous release
+
+## [2.0.2] - 20.07.2021
+
+- Fixed PHP 8.1 deprecation notice
+
+## [2.0.1] - 27.06.2020
+
+This release now supports the use of PHP 7.2+ and ^8.0
+
+## [2.0.0] - 10.05.2020
+
+This release now requires PHP 7.2+
+
+### Changed
+
+- Upgraded to phar-io/version 3.0
+    - Version strings `v1.2.3` will now be converted to valid semantic version strings `1.2.3`
+    - Abreviated strings like `1.0` will get expaneded to `1.0.0`  
+
+### Unreleased
+
+[Unreleased]: https://github.com/phar-io/manifest/compare/2.0.3...HEAD
+[2.0.3]: https://github.com/phar-io/manifest/compare/2.0.2...2.0.3
+[2.0.2]: https://github.com/phar-io/manifest/compare/2.0.1...2.0.2
+[2.0.1]: https://github.com/phar-io/manifest/compare/2.0.0...2.0.1
+[2.0.0]: https://github.com/phar-io/manifest/compare/1.0.1...2.0.0
+[1.0.3]: https://github.com/phar-io/manifest/compare/1.0.2...1.0.3
+[1.0.2]: https://github.com/phar-io/manifest/compare/1.0.1...1.0.2
+[1.0.1]: https://github.com/phar-io/manifest/compare/1.0.0...1.0.1