Adding upstream version 1.0.2.upstream/1.0.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Icinga DB Web
+
+Icinga DB is a set of components for publishing, synchronizing and
+visualizing monitoring data in the Icinga ecosystem, consisting of:
+
+* Icinga DB Web which connects to both a Redis server and a database to view and work with monitoring data
+* Icinga 2 with its [Icinga DB feature](https://icinga.com/docs/icinga-2/latest/14-features/#icinga-db) enabled,
+  responsible for publishing monitoring configuration, check results,
+  states changes and history items to the Redis server
+* And the [Icinga DB daemon](https://icinga.com/docs/icinga-db/latest/01-About/),
+  which synchronizes monitoring data between the Redis server and the database
+
+![Icinga DB Architecture](res/icingadb-architecture.png)
+
+## Features
+
+Icinga DB Web offers a modern and streamlined design to provide a clear and
+concise overview of your monitoring environment, also with dark and light mode support.
+
+![Icinga DB Dashboard](res/icingadb-dashboard.png)
+
+### Various List Layouts
+
+The view switcher allows to control the level of detail displayed in host and service list views:
+
+![View Switcher Preview](res/view-switcher-preview.png)
+
+### Search with Autocomplete
+
+The search bar in list views can be used for everything from simple searches to creating complex filters.
+It allows full keyboard control and also supports contextual auto-completion.
+In addition, there is an editor for easier filter creation.
+
+![Searchbar Completion Preview](res/searchbar-completion-preview.png)
+
+### Clean Detail Views
+
+Host and service detail views are structured to make best use of available space.
+Related information is grouped and important information is at the top for instant access without having to scroll down.
+
+![Service Detail Preview](res/service-detail-preview.png)
+
+### Modal Dialogs
+
+Any interaction that requires user input, such as acknowledging problems, scheduling downtimes, etc.,
+shows a modal dialog over the current view to preserve context and focus on interaction.
+
+![Modal Dialog Preview](res/modal-dialog-preview.png)
+
+### Bulk Operations
+
+Bulk interactions such as scheduling downtimes for multiple objects, acknowledging multiple problems, etc.
+are easily accomplished with the `Continue With` control that operates on filtered lists.
+
+![Continue With Preview](res/continue-with-preview.png)
+
+## Installation
+
+To install Icinga DB Web see [Installation](02-Installation.md).
+
+## License
+
+Icinga DB Web and the Icinga DB Web documentation are licensed under the terms of the
+GNU General Public License Version 2.