Ue4-docker

Changes

* Drop dependency on Flask (240) slonopotamus
* Add error on invalid target name (239) zorbathut
* Do dependency analysis with a set (238) zorbathut
* Add build target status output on startup (237) zorbathut
* Move config.buildTarget* into a dict. (235) zorbathut
* Improve ue4-build-prerequisites on Linux (222) slonopotamus
* Implement --target to replace the old --no-* options. (234) zorbathut
* RFC: Use BuildKit for all images (229) slonopotamus
* Bump actions/checkout from 2 to 3 (226) dependabot
* Bump actions/setup-python from 2 to 3 (224) dependabot
* Add missing dependency for WebBrowserWidget plugin under Linux (223) butterman0
* Add support for specifying linux basetag (221) russkel

Changes

* add CPU model to `ue4-docker info` slonopotamus
* fix `curl: option --progress: is ambiguous` on Windows slonopotamus

Changes

* Fix `unknown instruction: CD` when building ue4-source image on Windows (215) slonopotamus

Changes

* Add the ability to clone a specific commit of the Unreal Engine (214) adamrehn
* Add `ue4-docker export installed` support on Windows (213) slonopotamus
* Change `docker export installed` to use stopped container (212) slonopotamus

Changes

* Add missing ResampleDMO.dll on Windows Server 2022 (211) slonopotamus

Changes

* Automatically use correct changelist number for supported .0 releases
* Move X11 support to ue4-minimal image to support cooking WebBrowserWidget projects
* Add option to enable glibc DSO patch