Add deltachat spport page

app/templates/messaging.html

@@ -0,0 +1,18 @@
+{% extends "base.html" %}
+
+{% block content %}
+
+<div class="block">
+    <p> To use secure messaging, install Delta Chat and then return to this page to create your local offline account</p>
+</div>
+    <a href="{{ url_for('static', filename='DeltaChat_2.35.0_APKPure.apk') }}"><button class="button is-link is-fullwidth block">
+        <p>Step 1<br> Download and install</p>
+    </button>
+    </a>
+    <div class="block"></div>
+<form action="{{ url_for('generate_random_deltachat_credentials') }}" method="post">
+    <button type="submit" class="button is-link is-fullwidth block">
+        <p>Step 2 <br> Create offline account </p>
+    </button>
+ </form>
+{% endblock %}