Including gitCommit and version in frontend build. Backend now sending a backendInfo object containing commit, version and hostname. All printed on About page.

frontend/src/app/components/about/about.component.html

@@ -3,9 +3,13 @@
     <br>
     <img src="./resources/mempool-logo-bigger.png" height="62.5" width="250">
     <br>
+    <br>
 
-    <div class="text-small text-center offset-md-1">
-      v2.2-dev ({{ gitCommit$ | async }})
+    <div class="text-small">
+      Frontend:
+      v{{ packetJsonVersion }} ({{ frontendGitCommitHash }}) [{{ hostname }}]
+      <br>
+      Backend: v{{ (backendInfo$ | async ).version }} ({{ (backendInfo$ | async ).gitCommit | slice:0:8 }}) [{{ (backendInfo$ | async).hostname }}]
     </div>
 
     <br>