Feature/add link to system status page (#305)

* Add link to system status page

* Update changelog

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- Added a link to the system status page
+
 ### Changed
 
 - Improved the wording for the _Restricted View_: _Presenter View_

apps/client/src/app/pages/about/about-page.html

@@ -10,8 +10,10 @@
             stocks, ETFs or cryptocurrencies and make solid, data-driven
             investment decisions. The source code is fully available as open
             source software (OSS). The project has been initiated by
-            <a href="https://dotsilver.ch">Thomas Kaul</a> and is driven by the
-            efforts of its
+            <a href="https://dotsilver.ch" title="Website of Thomas Kaul"
+              >Thomas Kaul</a
+            >
+            and is driven by the efforts of its
             <a
               href="https://github.com/ghostfolio/ghostfolio/graphs/contributors"
               title="Contributors to Ghostfolio"
@@ -19,16 +21,29 @@
             >.
             <ng-container *ngIf="lastPublish">
               This instance is running Ghostfolio {{ version }} and has been
-              last published on {{ lastPublish }}.</ng-container
+              last published on {{ lastPublish }}. Check the system status at
+              <a href="https://status.ghostfol.io" title="Ghostfolio status"
+                >status.ghostfol.io</a
+              >.</ng-container
             >
           </p>
           <p>
             If you encounter a bug or would like to suggest an improvement or a
             new feature, please tweet to
-            <a href="https://twitter.com/ghostfolio_">@ghostfolio_</a>, send an
-            e-mail to <a href="mailto:hi@ghostfol.io">hi@ghostfol.io</a> or open
-            an issue at
-            <a href="https://github.com/ghostfolio/ghostfolio">GitHub</a>.
+            <a
+              href="https://twitter.com/ghostfolio_"
+              title="Tweet to Ghostfolio on Twitter"
+              >@ghostfolio_</a
+            >, send an e-mail to
+            <a href="mailto:hi@ghostfol.io" title="Send an e-mail"
+              >hi@ghostfol.io</a
+            >
+            or open an issue at
+            <a
+              href="https://github.com/ghostfolio/ghostfolio"
+              title="Find Ghostfolio on GitHub"
+              >GitHub</a
+            >.
           </p>
           <p class="text-center">
             <a