Updating toolshed to use get-tag

Having trouble with actions getting the right string from a release event. Hopefully this fixes it.

Author: thirtytwobits

.github/workflows/toolshed.yml

@@ -21,11 +21,25 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
+    - name: process event
+      id: process_event
+      uses: olegtarasov/[email protected]
+      with:
+        tagRegex: "(${{ env.IMAGE_VERSION_PREFIX }}).*"
+    - name: echo environment
+      run: |
+          echo "::group::environment"
+          echo "ORG_NAMESPACE=${{ env.ORG_NAMESPACE }}"
+          echo "IMAGE_NAME=${{ env.IMAGE_NAME }}"
+          echo "IMAGE_VERSION_PREFIX=${{ env.IMAGE_VERSION_PREFIX }}"
+          echo "GIT_TAG_NAME=${{ steps.process_event.outputs.tag }}"
+          echo "::debug event=${{ toJSON( github.event ) }}"
+          echo "::endgroup::"
     - name: dryrun-build
       if: ${{ github.event_name == 'pull_request' }}
       run: docker build ./${{ env.IMAGE_NAME }}
     - name: build-and-push
-      if: ${{ github.event_name == 'release' && startsWith(github.ref, env.IMAGE_VERSION_PREFIX) }}
+      if: ${{ github.event_name == 'release' && startsWith( steps.process_event.outputs.tag env.IMAGE_VERSION_PREFIX ) }}
       uses: macbre/push-to-ghcr@master
       with:
         context: ./${{ env.IMAGE_NAME }}