add wait for image step

.github/workflows/create-release.yml

@@ -1,5 +1,7 @@
 name: "Create release"
 
+env:
+  IMAGE_REPO: europe-docker.pkg.dev/kyma-project/prod/template-operator
 on:
   workflow_dispatch:
     inputs:
@@ -51,7 +53,13 @@ jobs:
       - name: Create lightweight tag
         run: |
           git tag ${{ github.event.inputs.name }}
-          git push origin ${{ github.event.inputs.name }}
+          git push origin ${{ github.event.inputs.name }} --tags
+      - name: Wait for the Docker image
+        timeout-minutes: 20
+        env:
+          ITERATIONS: 40
+          SLEEP_SECONDS: 30
+        run: ./scripts/release/wait_for_image.sh ${{ env.IMAGE_REPO }}:${{ github.event.inputs.name }} $ITERATIONS $SLEEP_SECONDS
       - name: Create release assets
         id: create-assets
         env:

scripts/release/wait_for_image.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -o nounset
+set -o errexit
+set -E
+set -o pipefail
+
+DOCKER_IMAGE=$1
+ITERATIONS=${2:-30}
+SLEEP_TIME="${3:-30}"
+
+for (( c=1; c<=ITERATIONS; c++ ))
+do
+    if docker manifest inspect "$DOCKER_IMAGE" > /dev/null 2>&1; then
+	    exit 0
+    fi
+    echo "Attempt $c: Docker image: $DOCKER_IMAGE doesn't exist"
+    if [[ $c -lt $ITERATIONS ]]; then
+        sleep "$SLEEP_TIME"
+    fi
+done
+
+echo "Fail: Docker image: $DOCKER_IMAGE doesn't exist"
+exit 1