ci: one-off model-engine mirror build (DELETE WHEN DONE)

Author: olliestanley

.github/workflows/mirror-build.yml

@@ -0,0 +1,40 @@
+name: mirror-build
+
+on:
+  push:
+    branches:
+      - 'mirror/**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - id: tag
+        run: |
+          PARENT=$(git rev-parse HEAD~1)
+          echo "tag=$PARENT" >> "$GITHUB_OUTPUT"
+          echo "Building tag: $PARENT"
+
+      - uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-region: us-west-2
+          aws-access-key-id: ${{ secrets.ARTIFACTS_AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.ARTIFACTS_AWS_SECRET_ACCESS_KEY }}
+          aws-session-token: ${{ secrets.ARTIFACTS_AWS_SESSION_TOKEN }}
+
+      - uses: aws-actions/amazon-ecr-login@v2
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: model-engine/Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: 022465994601.dkr.ecr.us-west-2.amazonaws.com/egp-mirror-int/model-engine:${{ steps.tag.outputs.tag }}
+          provenance: false