Revert "Drop healthcheck for now"

This reverts commit b0875c1858f081de624e9d15ab441534f4715537.

compose.yml

@@ -6,6 +6,12 @@ services:
     image: "decentral1se/cloud.autonomic.zone:latest"
     networks:
       - proxy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8000"]
+      interval: 10s
+      timeout: 10s
+      retries: 10
+      start_period: 15s
     deploy:
       update_config:
         failure_action: rollback