hack: add monthly rain link

app/assets/scripts/views/app.js

@@ -13,14 +13,22 @@ var App = React.createClass({
   },
 
   render: function () {
+
+    const monthStart = new Date('2019-01-01').toISOString();
+    const monthEnd   = new Date().toISOString();
+    const monthRainUrl = `https://api.opensensemap.org/statistics/descriptive?boxid=${config.senseBox.id}&from-date=${monthStart}&to-date=${monthEnd}&phenomenon=Niederschlag&window=30d&operation=sum&columns=boxName,unit&format=json&download=false`
+
     return (
       <div>
         <header className='site-header' role='banner'>
           <div className='inner'>
             <div className='site-headline'>
-              <h1 className='site-title'>
-                <a href={'https://opensensemap.org/explore/' + config.senseBox.id}>{config.title}</a>
-              </h1>
+              <span className='site-title'>{config.title}</span>
+              <span>
+                <a target='_blank' href={'https://opensensemap.org/explore/' + config.senseBox.id}>🗺️ Karte</a>
+                <br/>
+                <a target='_blank' href={monthRainUrl}>Niederschlag / Monat</a>
+              </span>
             </div>
           </div>
         </header>