add image compression pipeline

.github/workflows/image-compression.yml

@@ -0,0 +1,27 @@
+name: Compress Images
+on:
+  pull_request:
+    paths:
+      - "**.jpg"
+      - "**.jpeg"
+      - "**.png"
+      - "**.webp"
+      - "**.gif"
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+jobs:
+  build:
+    if: github.event.pull_request.head.repo.full_name == github.repository && !github.event.pull_request.draft
+    name: calibreapp/image-actions
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v2
+
+      - name: Compress Images
+        uses: calibreapp/image-actions@main
+        with:
+          githubToken: ${{ secrets.GITHUB_TOKEN }}