[FEATURE] Blog: make the blog posts looks much nicer and add a header image

themes/ccchh/layouts/partials/blog-header.html

@@ -5,7 +5,7 @@
 {{- $showAuthors := not (.reduced | default false) -}}
 
 {{ with $page }}
-      <header>
+      <header class="blog-header">
         {{- if $headingLink }}<a href="{{ .RelPermalink }}">{{ end }}
         <h{{ $level }}>{{ .Title }}</h{{ $level }}>
         {{- if $headingLink }}</a>{{ end }}
@@ -38,5 +38,6 @@
           {{- end }}
           {{- end }}
         </div>
+        {{ if isset .Params "header" }} <img class="container" src="{{ .Params.header.image }}" alt="{{ .Params.header.caption }}" /> {{ end }}
       </header>
 {{- end }}