Merge pull request #30 from cjellick/main

Fix tag ref

Author: cjellick

.github/workflows/release.yaml

@@ -18,6 +18,9 @@ jobs:
           registry: ghcr.io
           username: foobar
           password: ${{ secrets.GITHUB_TOKEN }}
-      - run: |
-          acorn build -t ghcr.io/acorn-io/acorn-dns:$GITHUB_REF .
-          acorn push ghcr.io/acorn-io/acorn-dns:$GITHUB_REF
+      - name: Set tag
+        run: echo "TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Build and push acorn
+        run: |
+          acorn build -t ghcr.io/acorn-io/acorn-dns:$TAG .
+          acorn push ghcr.io/acorn-io/acorn-dns:$TAG