* Some improvements for introduction/performance.md
* Minor improvements for example_datasets
* Add website/package-lock.json to .gitignore
* YT paragraph was badly outdated and there is no real reason to write a new one
* Use weird introduction article as a starting point for F.A.Q.
* Some refactoring of first half of ya_metrika_task.md
* minor
* Weird docs footer bugfix
* Forgotten redirect
* h/v scrollbars same size in docs
* CLICKHOUSE-3831: introduce security changelog
* A bit more narrow tables on docs front page
* fix flag in ru docs
* Save some space in top level of docs ToC
* Capitalize most words in titles of docs/en/
* more docs scrollbar fixes
* fix incorrect merge
* fix link
* fix switching languages in single page docs mode
* Update mkdocs & mkdocs-material + unminify javascript
* cherrypick 17e18d1ecc
* Maybe fix flappy test
* Make changelog
* Revert "Temporary revert doc about new package name (clickhouse-server vs cickhouse-server-common)"
This reverts commit 721153ed53.
* Revert "Temporary revert site about new package name (clickhouse-server vs clickhouse-server-common)"
This reverts commit ba5cb121ae.
* Better changelog
* Better
* Better changelog
* more
* Update CHANGELOG_RU.md
* Update CHANGELOG_RU.md
* Update CHANGELOG_RU.md