add option to expose ports per instance

defaults/main.yml

@@ -85,6 +85,8 @@ droneci_autoscaler_instances: []
 #           }
 #         }
 #       }
+#     exposed_ports:
+#       - "8080:8080"
 #     provider_config:
 #       - name: DRONE_HETZNERCLOUD_DATACENTER
 #         value: fsn1-dc14
@@ -142,7 +144,7 @@ droneci_autoscaler_networks:
   - name: droneci_default
     external: True
 
-# @var droneci_autoscaler_exposed_ports: $ "_unset_"
+droneci_autoscaler_exposed_ports: []
 # @var droneci_autoscaler_exposed_ports:example: >
 # droneci_autoscaler_exposed_ports:
 #   - "8080:8080"

templates/services/droneci_autoscaler_compose.yml.j2

@@ -7,9 +7,9 @@ services:
     container_name: {{ inst.name }}
     image: {{ droneci_autoscaler_image }}
     restart: {{ droneci_autoscaler_restart_policy }}
-    {% if droneci_autoscaler_exposed_ports | default([]) %}
+    {% if inst.exposed_ports | default(droneci_autoscaler_exposed_ports) | lenght > 0 %}
     ports:
-      {% for port in droneci_autoscaler_exposed_ports %}
+      {% for port in inst.exposed_ports | default(droneci_autoscaler_exposed_ports) %}
       - {{ port | quote }}
       {% endfor %}
     {% endif %}