add platform information to index view

gwcelery/templates/index.jinja2

@@ -288,6 +288,19 @@
             </form>
         </div>
     </div>
+    <div class="card mb-3">
+        <div class=card-header>
+            Platform information
+        </div>
+        <div class=card-body>
+            <p>
+                GWCelery host: <code>{{ hostname }}</code>
+            </p>
+            <p>
+                Platform: <code>{{ platform }}</code>
+            </p>
+        </div>
+    </div>
     <div class="card mb-3">
         <div class=card-header>
             Installed Packages

gwcelery/views.py

 """Flask web application views."""
 import datetime
+import platform
 import re
+import socket
 
 try:
     from importlib import metadata
@@ -28,7 +30,9 @@ def index():
     return render_template(
         'index.jinja2',
         conf=celery_app.conf,
+        hostname=socket.getfqdn(),
         packages=distributions,
+        platform=platform.platform(),
         versions=get_versions())