Fail the action if there is an issue retrieving tags

Author: lnhrdt

next-image-tag-number/action.sh

@@ -17,7 +17,7 @@ else
   AUTH_HEADER=""
 fi
 
-TAGS_LIST_JSON=$(curl -s $AUTH_HEADER "${IMAGE_REPOSITORY_URL}/tags/list")
+TAGS_LIST_JSON=$(curl -s $AUTH_HEADER "${IMAGE_REPOSITORY_URL}/tags/list") || exit 1
 TAGS=$(echo "$TAGS_LIST_JSON" | jq -r '.tags[]' || echo "")
 
 if [ -z "$TAGS" ]; then