Add testing inventory and group variables

Added fully test-ready inventory and groups using vagrant and able to
run repeatedly as necessary.

roles/caddy/tasks/main.yml

@@ -7,6 +7,8 @@
     state: directory
     mode: '0755'
   become: true
+  tags: 
+    - fs
 
 - name: Ensure Caddyfile exists
   ansible.builtin.template:
@@ -14,6 +16,8 @@
     dest: "{{ caddy_caddyfile_dir }}/Caddyfile"
     validate: "docker run --rm -v %s:/Caddyfile caddy caddy validate --config /Caddyfile"
   become: true
+  tags:
+    - fs
 
 - name: Deploy caddy to swarm
   community.general.docker_stack:
@@ -25,3 +29,5 @@
   with_items: "{{ caddy_stack }}"
   when: caddy_stack is defined
   become: yes
+  tags:
+    - docker-swarm