switching to eslint for code checking

most rules degraded to WARN, so we don't go insane. This will
change over time. The aim is to conform to a common style

Signed-off-by: Claudius Coenen <opensource@amenthes.de>

lib/web/imageRouter/filesystem.js

@@ -16,5 +16,5 @@ exports.uploadImage = function (imagePath, callback) {
     return
   }
 
-  callback(null, url.resolve(config.serverURL + '/uploads/', path.basename(imagePath)))
+  callback(null, url.URL.resolve(config.serverURL + '/uploads/', path.basename(imagePath)))
 }