STAC-0: update dockerhub creds (#147)

* STAC-0: update dockerhub creds

* STAC-0: use docker registry repovar

Author: deontaljaard

.github/workflows/ci.yml

@@ -129,9 +129,9 @@ jobs:
         uses: docker/login-action@v3
         if: github.event_name != 'pull_request'
         with:
-          registry: docker.io
-          username: ${{ secrets.DOCKER_USER }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ${{ secrets.DOCKERHUB_REGISTRY }}
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
       - name: Go releaser publish
         uses: goreleaser/goreleaser-action@v5
         env: