try plain docker.io

.tangled/workflows/deploy.yaml

···
       mkdir -p "$HOME"/.docker "$HOME"/.regctl
 
       cat > "$HOME"/.docker/config.json <<EOF
-      {"auths": {"https://index.docker.io/v2": {"auth":"$(echo -n "$DOCKER_USER:$DOCKER_PAT" | base64 -w0)"}}}
+      {"auths": {"docker.io": {"auth":"$(echo -n "$DOCKER_USER:$DOCKER_PAT" | base64 -w0)"}}}
       EOF
 
       cat > "$HOME"/.regctl/config.json <<EOF
-      {"hosts": {"https://index.docker.io/v2": {"user": "$DOCKER_USER","pass": "$DOCKER_PAT"}}}
+      {"hosts": {"docker.io": {"user": "$DOCKER_USER","pass": "$DOCKER_PAT"}}}
       EOF
   - name: "Docker build"
     command: |
       executor \
         --context=dir://. \
         --verbosity=debug \
-        --destination=https://index.docker.io/v2/"$DOCKER_USER"/ocw:server \
+        --destination=docker.io/"$DOCKER_USER"/ocw:server \
         --custom-platform=linux/amd64
   # - name: "Docker push"
   #   command: |