Add DockerSlim (alshedivat#1699)

.github/workflows/docker-slim.yml

@@ -0,0 +1,51 @@
+name: Docker Slim
+
+#Only trigger, when the build workflow succeeded
+on:
+  workflow_run:
+    workflows: ["Docker Image CI"]
+    types:
+      - completed
+
+# on: 
+#   push:
+#     branches: 
+#       - 'master'
+
+jobs: 
+  build:
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'alshedivat'
+
+    defaults:
+      run:
+        working-directory: ${{ github.workspace }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Login
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: update docker-compose
+      shell: bash
+      run:  |
+        sed -i "s|\.:|${{ github.workspace }}:|g" ${{ github.workspace }}/docker-compose.yml 
+        cat ${{ github.workspace }}/docker-compose.yml 
+        
+    - uses: kitabisa/docker-slim-action@v1.0.3
+      env:
+        DSLIM_PULL: true
+        DSLIM_COMPOSE_FILE: ${{ github.workspace }}/docker-compose.yml
+        DSLIM_TARGET_COMPOSE_SVC: jekyll
+        DSLIM_CONTINUE_AFTER: signal
+      with:
+        target: amirpourmand/al-folio
+        tag: "slim"
+
+    # Push to the registry
+    - run: docker image push amirpourmand/al-folio:slim