add generation of version for Release pipeline

Author: qvalentin

.github/workflows/stableRelease.yml

@@ -23,6 +23,10 @@ jobs:
         with:
           username: ${{ secrets.DOCKER_USER }}
           password: ${{ secrets.DOCKER_PW }}
+      -
+        name: Generate Image Tag from Git Tag
+        id: vars
+        run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
       -
         name: Build and push
         run: |