🔧(ci) add trivy scans for summary and agent

Closes #685: add a Trivy scan to the CI build steps for Meet Summary
and Meet Agents to ensure no vulnerabilities are present before pushing images
to the registry.

.github/workflows/docker-hub.yml

@@ -147,6 +147,13 @@ jobs:
         with:
           username: ${{ secrets.DOCKER_HUB_USER }}
           password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+      -
+        name: Run trivy scan
+        uses: numerique-gouv/action-trivy-cache@main
+        with:
+          docker-build-args: '-f src/summary/Dockerfile --target production'
+          docker-image-name: '${{ env.DOCKER_CONTAINER_REGISTRY_HOSTNAME }}/${{ env.DOCKER_CONTAINER_REGISTRY_NAMESPACE }}/meet-summary:${{ github.sha }}'
+          docker-context: './src/summary'
       -
         name: Build and push
         uses: docker/build-push-action@v6
@@ -178,6 +185,13 @@ jobs:
         with:
           username: ${{ secrets.DOCKER_HUB_USER }}
           password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+      -
+        name: Run trivy scan
+        uses: numerique-gouv/action-trivy-cache@main
+        with:
+          docker-build-args: '-f src/agents/Dockerfile --target production'
+          docker-image-name: '${{ env.DOCKER_CONTAINER_REGISTRY_HOSTNAME }}/${{ env.DOCKER_CONTAINER_REGISTRY_NAMESPACE }}/meet-agents:${{ github.sha }}'
+          docker-context: './src/agents'
       -
         name: Build and push
         uses: docker/build-push-action@v6