Add environment templating to concourse_worker state

app/concourse_worker/defaults.yaml

@@ -5,6 +5,7 @@ container:
   tag: latest
   restart: unless-stopped
   shm_size: 64M
+  env: {}
 
 settings:
   data_dir: /opt/concourse/data

app/concourse_worker/init.sls

@@ -48,6 +48,12 @@ concourse worker container:
     - binds:
       - {{ settings.data_dir }}:/data:ro
       - /var/run/docker.sock:/var/run/docker.sock
+{% if container.env %}
+    - environment:
+{%- for key, value in container.env.items() %}
+      - {{ key }}: {{ value | yaml_squote }}
+{%- endfor %}
+{% endif %}
     - command: >
         worker
         --tsa-host={{ settings.tsa_host }}