Add workflow to delete image from registry (#2434)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: mathbunnyru

.github/workflows/image-delete.yml

@@ -0,0 +1,81 @@
+name: Delete image from registry
+
+env:
+  OWNER: ${{ github.repository_owner }}
+
+on:
+  workflow_dispatch:
+    inputs:
+      image:
+        description: Image name to delete (e.g. base-notebook)
+        required: true
+        type: choice
+        options:
+          - docker-stacks-foundation
+          - base-notebook
+          - minimal-notebook
+          - scipy-notebook
+          - r-notebook
+          - julia-notebook
+          - tensorflow-notebook
+          - pytorch-notebook
+          - datascience-notebook
+          - pyspark-notebook
+          - all-spark-notebook
+      tag:
+        description: Image tag to delete (e.g. 2024-01-01 or latest)
+        required: true
+        type: string
+      registry:
+        description: Registry to delete from
+        required: true
+        type: choice
+        default: quay
+        options:
+          - dockerhub
+          - quay
+          - both
+
+jobs:
+  image-delete:
+    runs-on: ubuntu-24.04
+    environment: registry-image-delete
+    permissions:
+      contents: read
+    timeout-minutes: 5
+    if: (github.repository_owner == 'jupyter' || github.repository_owner == 'mathbunnyru') && github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Install skopeo 📦
+        run: sudo apt-get update && sudo apt-get install -y skopeo
+
+      - name: Login to Docker Hub 🔐
+        if: inputs.registry == 'dockerhub' || inputs.registry == 'both'
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
+          DOCKERHUB_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+        run: |
+          skopeo login docker.io \
+            --username "$DOCKERHUB_USERNAME" \
+            --password "$DOCKERHUB_TOKEN"
+
+      - name: Login to Quay.io 🔐
+        if: inputs.registry == 'quay' || inputs.registry == 'both'
+        run: |
+          skopeo login quay.io \
+            --username ${{ secrets.QUAY_USERNAME }} \
+            --password ${{ secrets.QUAY_ROBOT_TOKEN }}
+
+      - name: Delete tag from Docker Hub 🗑️
+        if: inputs.registry == 'dockerhub' || inputs.registry == 'both'
+        run: |
+          skopeo delete \
+            docker://docker.io/${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.tag }}
+          echo "Successfully deleted ${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.tag }} from Docker Hub"
+
+      - name: Delete tag from Quay.io 🗑️
+        if: inputs.registry == 'quay' || inputs.registry == 'both'
+        run: |
+          skopeo delete \
+            docker://quay.io/${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.tag }}
+          echo "Successfully deleted ${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.tag }} from Quay.io"