Dashboard (#3530)

* Add dashboard and chart basics

* More widgets

* Make widgets responsive

* Layout dashboard

* Prepare ExplorerClient

* Switch to Chartist

* Dynamic data for store numbers and recent transactions tiles

* Dynamic data for recent invoices tile

* Improvements

* Plug NBXPlorer DB

* Properly filter by code

* Reorder cheat mode button

* AJAX update for graph data

* Fix create invoice button

* Retry connection on transient issues

* App Top Items stats

* Design updates

* App Sales stats

* Add points for weekly histogram, set last point to current balance

Co-authored-by: nicolas.dorier <nicolas.dorier@gmail.com>

BTCPayServer/Configuration/DefaultConfiguration.cs

@@ -50,6 +50,8 @@ namespace BTCPayServer.Configuration
             app.Option("--recommended-plugins", "Plugins which would be marked as recommended to be installed. Separated by newline or space", CommandOptionType.MultipleValue);
             app.Option("--xforwardedproto", "If specified, set X-Forwarded-Proto to the specified value, this may be useful if your reverse proxy handle https but is not configured to add X-Forwarded-Proto (example: --xforwardedproto https)", CommandOptionType.SingleValue);
             app.Option("--cheatmode", "Add elements in the UI to facilitate dev-time testing (Default false)", CommandOptionType.BoolValue);
+
+            app.Option("--explorerpostgres", $"Connection string to the postgres database of NBXplorer. (optional, used for dashboard and reporting features)", CommandOptionType.SingleValue);
             foreach (var network in provider.GetAll().OfType<BTCPayNetwork>())
             {
                 var crypto = network.CryptoCode.ToLowerInvariant();