Merge branch '10-3-stable-prepare-rc1' of...

CHANGELOG.md

app/views/projects/environments/metrics.html.haml

...5-prometheus-loading-screen-no-longer-seems-to-appear.yml

doc/ci/docker/using_docker_images.md

doc/install/installation.md

doc/update/10.2-to-10.3.md

vendor/Dockerfile/CONTRIBUTING.md

vendor/Dockerfile/LICENSE

vendor/gitignore/Global/Matlab.gitignore

vendor/gitignore/Go.gitignore

vendor/gitignore/Haskell.gitignore

vendor/gitignore/Jekyll.gitignore

vendor/gitignore/ROS.gitignore

vendor/gitignore/Symfony.gitignore

vendor/gitignore/TeX.gitignore

vendor/gitignore/Unity.gitignore

vendor/gitignore/UnrealEngine.gitignore

vendor/gitignore/VisualStudio.gitignore

vendor/gitlab-ci-yml/Auto-DevOps.gitlab-ci.yml

vendor/gitlab-ci-yml/CONTRIBUTING.md