PTFE-687: action to sync two registries

registry-image-sync/action.yaml

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+name: "Sync images between two registries"
+description: "sync images between two registries using skopeo"
+
+inputs:
+  SOURCE_REGISTRY:
+    description: "the source registry"
+    required: true
+  TARGET_REGISTRY:
+    description: "the target registry"
+    required: true
+  IMAGE_NAME:
+    description: "the name of the image to sync"
+  SOURCE_REPO:
+    description: "the source repo that contains the images"
+  SRC_USERNAME:
+    description: "the username in the source registry"
+  SRC_PASSWORD:
+    description: "the password in source registry"
+  DEST_USERNAME:
+    description: "the username in destination registry"
+  DEST_PASSWORD:
+    description: "the password in destination registry"
+
+
+runs:
+  using: "composite"
+  steps:
+    - name: Sync images from ${{ inputs.SOURCE_REGISTRY }} to ${{ inputs.TARGET_REGISTRY }}
+      shell: bash
+      run: |-
+        skopeo sync \
+        --src docker \
+        --dest docker \
+        --all \
+        --src-creds ${{ inputs.SRC_USERNAME }}:${{ inputs.SRC_PASSWORD }} \
+        --dest-creds ${{ inputs.DEST_USERNAME }}:${{ inputs.DEST_PASSWORD }} \
+        ${{ inputs.SOURCE_REGISTRY }}/${{ inputs.SOURCE_REPO }}/${{ inputs.IMAGE_NAME }} \
+        ${{ inputs.TARGET_REGISTRY }}

registry-image-sync/readme.md

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+# Overview
+
+This action helps to sync images between two container registries
+
+# Example
+
+on:
+  workflow_dispatch:
+```yaml
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    container:
+      image: quay.io/skopeo/stable
+    steps:
+      - name: Sync images
+        uses: scality/actions/registry-image-sync
+        with:
+          SOURCE_REPO: <repo-name> # Ex bert-e
+          IMAGE_NAME: <image-name> # Ex bert-e
+          SRC_USERNAME: ${{ secrets.<src-username> }}
+          SRC_PASSWORD:  ${{ secrets.<src-password> }}
+          DEST_USERNAME: ${{ github.repository_owner }}
+          DEST_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
+```