add two nixos-managed VMs for docker swarm

change docker swarm ansible to target these vms

legacy/projects/docker_swarm/ansible/playbooks/setup-nixos.yml

@@ -0,0 +1,23 @@
+---
+
+- name: Setup Docker Swarm manager
+  hosts: manager
+  tasks:
+    - name: Create Docker Swarm
+      docker_swarm:
+    
+    - name: Get Docker Swarm manager info
+      docker_swarm_info:
+        nodes: yes
+        nodes_filters:
+          name: manager
+      register: swarm_info
+
+- hosts: workers
+  tasks:
+    - name: Join Docker Swarm
+      docker_swarm:
+        state: join
+        join_token: "{{ hostvars.manager.swarm_info.swarm_facts.JoinTokens.Worker }}"
+        remote_addrs:
+          - "{{ hostvars.manager.ansible_default_ipv4.address }}"