feat: basic PDS playbook

templates/Caddyfile.j2

@@ -0,0 +1,17 @@
+{
+  email {{ pds_admin_email }}
+  on_demand_tls {
+    ask http://localhost:3000/tls-check
+  }
+}
+
+*.{{ pds_hostname }}, {{ pds_hostname }} {
+  tls {
+    on_demand
+  }
+  log {
+    output stdout
+    format json
+  }
+  reverse_proxy http://localhost:3000
+}