update frontpage image, move wiki note to bottom

README.md

-# card10
-
-Welcome to the official wiki of the ccccamp2019 badge: card10 (cardio).
-
-**Note**: *This is not yet a functional wiki. Please bear with us while we set up a git based markdown wiki. In the meantime you can contribute to the wiki by creating a user account on gitlab.hamburg.ccc.de and sharing it with lilafisch (whom you can find in the matrix/irc channel). Once the wiki is moved to the new server, you will have to create a new account.*
-
-
-
-## Overview
 
 Hello, my name is card10:
 
-<img class="center" alt="Photo of the card10 badge" src="/media/wristband/IMG_20190526_180236.jpg"  width="420" height="auto" align="center">
+<img class="center" alt="Photo of the card10 badge" src="/media/frontpage-nice-image.jpg"  width="420" height="auto" align="center">
 
 
 - Community
@@ -39,3 +30,7 @@ Hello, my name is card10:
 - [Fundamental board](en/fundamental-board-overview.md)
 - [usb-c](en/usbc.md)
  
+**Note**: *This is not yet a functional wiki. Please bear with us while we set up a git based markdown wiki. In the meantime you can contribute to the wiki by creating a user account on gitlab.hamburg.ccc.de and sharing it with lilafisch (whom you can find in the matrix/irc channel). Once the wiki is moved to the new server, you will have to create a new account.*
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