centered Apple ][+ header, added rank dynamics header, favicon

updated main.scss to center Apple ][+ header image. moved header image into \apple2 folder. added rankdynamicsheader.jpg and updated main.scss. added {% include head/custom.html %} to bottom of _includes\head.html.

Author: mdcramer

_data/blogs.yml

@@ -15,7 +15,7 @@ internal_blogs:
 
   - name: rank dynamics
     description: A backup of the blog from the company I founded. We improved search by transforming the traditional static list of links into a fluid experience where relevance was improved by dynamically re-ranking results in response to implicit user feedback.
-    background: orangered # darkgoldenrod works
+    background: rankdynamicsheader # darkgoldenrod works
 
 external_blogs:
   - name: Mortal Wayfare

_includes/head.html

@@ -40,4 +40,6 @@
     {% endif %}
     <script src="{{ script_path }}"></script>
   {% endfor %}
-{% endif %}
+{% endif %}
+
+{% include head/custom.html %}

assets/css/main.scss

@@ -42,11 +42,15 @@
                -1px 1px 2px rgba(255,255,255,0.7) !important;
 }
 
-/* Apple 2 blog specific header */
+/* Blog specific headers */
 /* https://claude.ai/share/ea376385-c62a-4607-93a6-51cc03e81b1d */
 .page__hero--overlay[style*="apple2header"] {
   background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)), 
-              url('/assets/images/apple2-header.jpg') center top/cover no-repeat !important;
+              url('/assets/images/apple2/apple2-header.jpg') center center/cover no-repeat !important;
+}
+.page__hero--overlay[style*="rankdynamicsheader"] {
+  background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)), 
+              url('/assets/images/rank-dynamics/rankdynamicsheader.jpg') center top/cover no-repeat !important;
 }
 
 /* define the no-break class to prevent any line breaks within that element */