add docker log options for container worker

app/concourse_worker/defaults.yaml

@@ -3,6 +3,10 @@
 container:
   binds: []
   env: {}
+  log_options:
+    max-buffer-size: 4m
+    max-file: 3
+    max-size: 10m
   image: concourse/concourse
   restart: unless-stopped
   shm_size: 64M

app/concourse_worker/init.sls

@@ -45,6 +45,12 @@ concourse worker container:
     - privileged: true
     - shm_size: {{ container.shm_size }}
     - restart_policy: "{{ container.restart }}"
+{%- if container.log_options %}
+    - log_opt:
+{%- for key, value in container.log_options.items() %}
+      - {{ key | yaml_squote }}: {{ value | yaml_dquote }}
+{%- endfor %}
+{% endif %}
     - labels:
       - appname=concourse
       - concourse.type=worker