Added extra woodpecker agent

stacks/woodpecker.yml

@@ -56,7 +56,7 @@ services:
     volumes:
       - 'db-data:/var/lib/postgresql/data'
 
-  agent:
+  agent-1:
     image: 'woodpeckerci/woodpecker-agent:latest'
     command: agent
 
@@ -64,7 +64,23 @@ services:
       mode: 'global'
       placement:
         constraints:
-          - 'node.labels.class.ci==true'
+          - 'node.hostname==gamma'
+
+    environment:
+      - 'WOODPECKER_SERVER=app:9000'
+      - 'WOODPECKER_AGENT_SECRET=${WOODPECKER_AGENT_SECRET}'
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+
+  agent-2:
+    image: 'woodpeckerci/woodpecker-agent:latest'
+    command: agent
+
+    deploy:
+      mode: 'global'
+      placement:
+        constraints:
+          - 'node.hostname==alpha'
 
     environment:
       - 'WOODPECKER_SERVER=app:9000'