Moved Curator healthcheck to the image.

curator/Dockerfile

 FROM python:3.6-alpine
 RUN pip install --no-cache-dir elasticsearch-curator==5.4.1
 CMD /usr/sbin/crond -f
+HEALTHCHECK --timeout=1s CMD pgrep crond || exit 1

docker-compose.yml

@@ -163,11 +163,6 @@ services:
         #    context: ./curator
         links:
             - elasticsearch
-        healthcheck:
-            test: ["CMD", "pgrep", "crond"]
-            interval: 10s
-            timeout: 3s
-            retries: 10
         restart: always
         logging: *logging
         environment: