Feature/add screenshot (#251)

* Add screenshot

* Update changelog

apps/client/src/app/pages/blog/2021/07/hallo-ghostfolio/hallo-ghostfolio-page.html

@@ -65,6 +65,14 @@
             Finanzierung einer Wohnung, Ghostfolio bietet eine solide,
             datengestützte Entscheidungshilfe.
           </p>
+          <p class="my-5 text-center">
+            <img
+              alt="Ghostfol.io Screenshot"
+              src="./assets/images/screenshot.png"
+              style="max-width: 100%; width: 20rem"
+              title="Ghostfol.io Screenshot"
+            />
+          </p>
           <p>
             Ich lege grossen Wert auf Datenschutz. Als
             <a href="https://github.com/ghostfolio/ghostfolio"

apps/client/src/app/pages/blog/2021/07/hello-ghostfolio/hello-ghostfolio-page.html

@@ -63,6 +63,14 @@
             asset classes (stocks, cryptocurrencies, ETFs, etc.) or financing an
             apartment, Ghostfolio offers solid, data-driven decision support.
           </p>
+          <p class="my-5 text-center">
+            <img
+              alt="Ghostfol.io Screenshot"
+              src="./assets/images/screenshot.png"
+              style="max-width: 100%; width: 20rem"
+              title="Ghostfol.io Screenshot"
+            />
+          </p>
           <p>
             As I value privacy, data protection is an integral part of
             Ghostfolio. As