fix compose v3 syntax

defaults/main.yml

@@ -11,10 +11,16 @@ droneci_runner_docker_service_directory: /var/lib/docker/services/droneci
 droneci_runner_docker_socket_path: /var/run/docker.sock
 droneci_runner_docker_service_stopped: False
 
-# @var droneci_runner_docker_memory_limit:example: $ "512m"
-# @var droneci_runner_docker_memory_limit: $ "_unset_"
-# @var droneci_runner_docker_memory_reservation:example: $ "256m"
-# @var droneci_runner_docker_memory_reservation: $ "_unset_"
+# @var droneci_runner_docker_resources: $ "_unset_"
+# @var droneci_runner_docker_resources:example: >
+# droneci_runner_docker_resources:
+#   limits:
+#     cpus: "0.50"
+#     memory: 50M
+#   reservations:
+#     cpus: "0.25"
+#     memory: 20M
+# @end
 
 # @var droneci_runner_docker_networks:example: >
 # droneci_runner_docker_networks:

templates/services/droneci_runner_compose.yml.j2

@@ -20,11 +20,9 @@ services:
       - DRONE_RPC_HOST={{ droneci_runner_docker_server }}
       - DRONE_RPC_SECRET={{ droneci_runner_docker_secret }}
       - DRONE_RUNNER_CAPACITY={{ droneci_runner_docker_capacity }}
-    {% if droneci_runner_docker_memory_limit is defined %}
-    mem_limit: {{ droneci_runner_docker_memory_limit }}
-    {% endif %}
-    {% if droneci_runner_docker_memory_reservation is defined %}
-    mem_reservation: {{ droneci_runner_docker_memory_reservation }}
+    {% if droneci_runner_docker_resources is defined %}
+    resources:
+      {{ droneci_runner_docker_resources | to_nice_yaml | indent(6) }}
     {% endif %}
 
 {% if droneci_runner_docker_networks | default([]) %}