IOT Playbook updated with docker networks and caddy.

iot/roles/caddy/defaults/main.yaml

@@ -0,0 +1,7 @@
+
+caddy_container: caddy
+caddyfile_path: /var/lib/caddy/conf/Caddyfile
+snippet_block: |
+  {{ host }} {
+      reverse_proxy {{ grafana_container }}:3000
+  }