Chainstack updates: September 3, 2019

Security. Protected endpoints added for Quorum and Ethereum nodes.
Deployment. Bolt snapshots are now updated hourly so that nodes are deployed and synchronized with fresher snapshots.
Protocols. Numerous stability improvements for Quorum networks and nodes.
Activity and events. In-platform notifications and activity log introduced to provide visibility into account activity.
Documentation. Complete content and structure overhaul for improved access, browsing, and discovery.