update poster image

frontend/src/templates.js

@@ -6,7 +6,7 @@ import newspaperQuoteBottomImage from './assets/previews/newspaper_quote_bottom.
 import newspaperQuoteMiddleImage from './assets/previews/newspaper_quote_middle.png'
 import facebookSurveyImage from './assets/previews/facebook_survey.png'
 import twitterBannerImage from './assets/previews/twitter_banner.png'
-import posterImage from './assets/previews/basic_photo_banner.png'
+import posterImage from './assets/previews/poster.png'
 
 
 const TEMPLATES = {