🤖 Make arm64 workers use docker mirror (#2850)

.github/workflows/reusable-docker-arm-build.yaml

@@ -25,7 +25,8 @@ on:
       base_image:
         required: true
         type: string
-
+env:
+  FORCE_COLOR: 1
 permissions: read-all
 jobs:
   build:
@@ -105,6 +106,21 @@ jobs:
           registry: quay.io
           username: ${{ secrets.QUAY_USERNAME }}
           password: ${{ secrets.QUAY_PASSWORD }}
+      - name: Set local mirror
+        if: ${{ inputs.worker == 'ARM64' }}
+        run: |
+          # Configure earthly to use the docker mirror in CI
+          # https://docs.earthly.dev/ci-integration/pull-through-cache#configuring-earthly-to-use-the-cache
+          mkdir -p ~/.earthly/
+          cat << EOF > ~/.earthly/config.yml
+          global:
+            buildkit_additional_config: |
+              [registry."docker.io"]
+                mirrors = ["registry.docker-mirror.svc.cluster.local:5000"]
+              [registry."registry.docker-mirror.svc.cluster.local:5000"]
+                insecure = true
+                http = true
+          EOF
       - name: Set compression for PR
         if: ${{ github.event_name == 'pull_request' }}
         run: |