Add base template for email notification

aleksis/core/templates/templated_email/base.email

+{% load i18n html2text %}
+
+{% block subject %}
+ {{ request.site.preferences.general__title": " }}
+{% endblock %}
+
+
+{% block plain %}
+  {% trans "Hello, " %}
+
+
+
+  {% trans "- "{{ request.site.preferences.general__title }} %}
+
+{% endblock %}
+
+{% block html %}
+  <style>
+    {% include "email.css" %}
+  </style>
+  <main>
+    <div class="align-center">
+      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="green" width="70px" height="70px">
+        <path d="M0 0h24v24H0z" fill="none"/>
+        <path
+            d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"/>
+      </svg>
+    </div>
+
+    <p>{% trans "Hello," %}</p>
+
+    <p>{% trans "- " {{ request.site.preferences.general__title }}%}</p>
+  </main>
+{% endblock %}

aleksis/core/templates/templated_email/email.css

+body {
+    line-height: 1.5;
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
+    font-weight: normal;
+    color: rgba(0, 0, 0, 0.87);
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+table, tr {
+    width: 100%;
+}
+
+main {
+    max-width: 700px;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.12), 0 1px 5px 0 rgba(0, 0, 0, 0.2);
+    -webkit-box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.12), 0 1px 5px 0 rgba(0, 0, 0, 0.2);
+    -webkit-transition: -webkit-box-shadow .25s;
+    transition: -webkit-box-shadow .25s;
+    transition: box-shadow .25s;
+    transition: box-shadow .25s, -webkit-box-shadow .25s;
+    padding: 24px;
+    margin: .5rem 0 1rem 0;
+    border-radius: 2px;
+    background-color: #fff;
+    margin: 30px;
+    padding: 20px;
+}
+
+.first th {
+    border-bottom: 1px solid;
+}
+
+
+
+td, th {
+    padding-left: 5px;
+    padding-right: 5px;
+}
+
+.align-center {
+    text-align: center;
+}