Fix images in rss feed and default blog post image

blog/index.html

@@ -17,7 +17,7 @@ <h1 class="color-gray-800 weight-700">{% t titles.blog %}</h1>
                     <div class="col-12 col-md-4 mb-4 d-flex">
                       <div class="card highlight-card">
                         <a class="stretched-link" href="{{ site.baseurl }}{{ blog.url | replace:'.html','' }}"></a>
-                          <img src="/assets/{% if blog.image %}images/blog/{{ blog.image }}{% else %}branding/default-cover.png{% endif %}" loading="lazy" />
+                          <img src="/assets/images/blog/{% if blog.image %}{{ blog.image }}{% else %}2020/default.png{% endif %}" loading="lazy" />
                           <h3 class="weight-700 pt-4">{{ blog.title }}</h3>
                           <p class="mb-4">{{ blog.excerpt | strip_html | truncate: 100 }}</p>
                           <div class="bottom">

rss.xml

@@ -2,13 +2,13 @@
 layout: null
 ---
 <?xml version="1.0"?>
-<rss version="2.0">
+<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
     <channel>
         <title>AntennaPod Blog</title>
         <description>AntennaPod Blog posts</description>
         <link>{{ site.url }}/blog</link>
         <image>
-            <url>{{ site.url }}/assets/images/favicons/android-chrome-512x512.png</url>
+            <url>{{ site.url }}/assets/branding/favicons/android-chrome-512x512.png</url>
             <title>AntennaPod Blog</title>
         </image>
         <language>en-us</language>
@@ -26,6 +26,7 @@ layout: null
                 {{ blog.content | replace:'="/',url_and_equals }}
             ]]></description>
             <pubDate>{{ blog.date | date_to_rfc822 }}</pubDate>
+            <media:content medium="image" url="{{ site.url }}/assets/images/blog/{% if blog.image %}{{ blog.image }}{% else %}2020/default.png{% endif %}" />
         </item>
         {% endif %}
         {% endfor %}