Merge branch 'addImageLicenseForHAStK' into 'master'

Add image license for HAStK

Closes #219

See merge request !103

config/services.yaml

@@ -81,6 +81,7 @@ parameters:
         Leopoldina Archiv: ['CC BY-ND 4.0', 'https://creativecommons.org/licenses/by-nd/4.0/deed.de']
         SMB-ZA: ['Public Domain Mark 1.0', 'https://creativecommons.org/publicdomain/mark/1.0/deed.de']
         RSA: ['CC BY-NC-SA 4.0', 'https://creativecommons.org/licenses/by-nc-sa/4.0/deed.de']
+        HAStK: ['Public Domain Mark 1.0', 'https://creativecommons.org/publicdomain/mark/1.0/deed.de']
 
 services:
     # default configuration for services in *this* file