Use action to grab tagname

Author: kristof-ringleff

.github/workflows/docker.yml

@@ -24,8 +24,8 @@ jobs:
         uses: "actions/checkout@v2.0.0"
 
       - name: "Grab version number"
-        id: "get_version"
-        run: "echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}"
+        uses: "olegtarasov/get-tag@v1"
+        id: "tagName"
 
       - name: "Build Docker image"
         run: "docker build --tag extdn/${{ matrix.actions-with-docker-image }}-action:latest ${{ matrix.actions-with-docker-image }}/."
@@ -37,10 +37,10 @@ jobs:
         run: "docker push extdn/${{ matrix.actions-with-docker-image }}-action:latest"
 
       - name: "Tag Docker image (versioned)"
-        run: "docker tag extdn/${{ matrix.actions-with-docker-image }}-action extdn/${{ matrix.actions-with-docker-image }}-action:${{steps.get_version.outputs.name}}"
+        run: "docker tag extdn/${{ matrix.actions-with-docker-image }}-action extdn/${{ matrix.actions-with-docker-image }}-action:${{ steps.tagName.outputs.tag }}"
 
       - name: "Push Docker image (versioned)"
-        run: "docker push extdn/${{ matrix.actions-with-docker-image }}-action:${{steps.get_version.outputs.name}}"
+        run: "docker push extdn/${{ matrix.actions-with-docker-image }}-action:${{ steps.tagName.outputs.tag }}"
 
       - name: "Docker Logout"
         run: "docker logout"