only push releases to dockerhub

Author: weickmanna

.github/workflows/ktorbase.yml

@@ -57,7 +57,7 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name == 'release' }}
-          tags: linkedplanet/ktorbase:latest,linkedplanet/ktorbase:${{ VERSION }}
+          tags: linkedplanet/ktorbase:latest,linkedplanet/ktorbase:${{ env.VERSION }}
 
       - name: Start KtorBase
         run: docker run -d -p 9090:9090 -e APPLICATION_SECRET=0000000000000000000000000000000 linkedplanet/ktorbase:latest