Update header.html

Author: hendric

src/views/header.html

@@ -1,5 +1,5 @@
 <header class="sans-serif navy">
-  <div class="dt w-100 vh-30 center cover">
+  <div class="dt w-100 vh-30 center cover" style="background-image:url('/imgs/port-2880619_1920.jpg')">
     <div class="dtc"> 
       <div class="tc-ns mt2 mt3-ns ph3">
         <h1 class="dn f2 f1-l fw2 white-90 mb0 lh-title">JeffConf Hamburg 2018</h1>
@@ -10,4 +10,4 @@ <h1 class="dn f2 f1-l fw2 white-90 mb0 lh-title">JeffConf Hamburg 2018</h1>
   <div class="center mw6 mw7-l hamburg-red-bg pa3 tc ba b--transparent br2 header-stripe">
     <h2 class="ma0 f5 f4-l white code">Hamburg - February 16th</h2>
   </div>
-</header>
+</header>