chore(ci): Implement a cleanup of Docker images (#2302)

This adds a workflow to clean containers when the pull request closes
and remove untagged images generated as tags are updated

.github/workflows/docker-cleanup.yml

@@ -0,0 +1,77 @@
+# This workflow runs on certain conditions to check for and potentially
+# delete container images from the GHCR which no longer have an associated
+# code branch.
+# Requires a PAT with the correct scope set in the secrets.
+#
+# This workflow will not trigger runs on forked repos.
+
+name: Cleanup Old Docker Images
+
+on:
+  pull_request:
+    types:
+      - "closed"
+  push:
+    paths:
+      - ".github/workflows/docker-cleanup.yml"
+
+concurrency:
+  group: registry-tags-cleanup
+  cancel-in-progress: false
+
+jobs:
+  cleanup-images:
+    name: Cleanup Stale Images Tags for ${{ matrix.primary-name }}
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - primary-name: "immich-server"
+          - primary-name: "immich-machine-learning"
+          - primary-name: "immich-web"
+          - primary-name: "immich-proxy"
+    env:
+      # Requires a personal access token with the OAuth scope delete:packages
+      TOKEN: ${{ secrets.PACKAGE_DELETE_TOKEN }}
+    steps:
+      -
+        name: Clean temporary images
+        if: "${{ env.TOKEN != '' }}"
+        uses: stumpylog/image-cleaner-action/ephemeral@develop
+        with:
+          token: "${{ env.TOKEN }}"
+          owner: "immich-app"
+          is_org: "true"
+          package_name: "${{ matrix.primary-name }}"
+          scheme: "pull_request"
+          repo_name: "immich"
+          match_regex: '^pr-(\d+)$|^(\d+)$'
+
+  cleanup-untagged-images:
+    name: Cleanup Untagged Images Tags for ${{ matrix.primary-name }}
+    runs-on: ubuntu-22.04
+    needs:
+      - cleanup-images
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - primary-name: "immich-server"
+          - primary-name: "immich-machine-learning"
+          - primary-name: "immich-web"
+          - primary-name: "immich-proxy"
+          - primary-name: "immich-build-cache"
+    env:
+      # Requires a personal access token with the OAuth scope delete:packages
+      TOKEN: ${{ secrets.PACKAGE_DELETE_TOKEN }}
+    steps:
+      -
+        name: Clean untagged images
+        if: "${{ env.TOKEN != '' }}"
+        uses: stumpylog/image-cleaner-action/untagged@develop
+        with:
+          token: "${{ env.TOKEN }}"
+          owner: "immich-app"
+          is_org: "true"
+          package_name: "${{ matrix.primary-name }}"