fix: require instance name and add default instance

defaults/main.yml

@@ -2,7 +2,6 @@
 woodpecker_agent_image: "docker.io/woodpeckerci/woodpecker-agent:latest"
 
 woodpecker_agent_service_started: True
-woodpecker_agent_name: agent-1
 
 # @var woodpecker_agent_volumes:description: Define required docker volumes.
 woodpecker_agent_volumes:
@@ -44,9 +43,5 @@ woodpecker_agent_filter_labels: []
 woodpecker_agent_env: []
 
 # @var woodpecker_agent_instances:description: List of multiple agents to deploy.
-# @var woodpecker_agent_instances:example: >
-# woodpecker_agent_instances:
-#   - name: agent-1
-#     filter_labels: []
-# @end
-woodpecker_agent_instances: []
+woodpecker_agent_instances:
+  - name: agent-1

tasks/instance.yml

@@ -1,7 +1,7 @@
 ---
 - name: Register agent metadata
   set_fact:
-    __woodpecker_agent_name: "{{ inst.name | default(woodpecker_agent_name) | regex_replace('[^a-z0-9]+', '-', ignorecase=True) }}"
+    __woodpecker_agent_name: "{{ inst.name | regex_replace('[^a-z0-9]+', '-', ignorecase=True) }}"
     __woodpecker_agent_volumes: "{{ inst.volumes | default(woodpecker_agent_volumes) }}"
     __woodpecker_agent_cap_add: "{{ inst.cap_add | default(woodpecker_agent_cap_add) }}"
     __woodpecker_agent_cap_drop: "{{ inst.cap_drop | default(woodpecker_agent_cap_drop) }}"