docs: monitoring public HTML needs Caddy/www root apply (I-09)

Document merchant JSON code 21 on /monitoring* as infra (not suite).
Topic note, day log, ISSUES I-09, pointer README, sync prepared Caddyfile.

scripts/taler-monitoring/README.md

@@ -1,26 +1,27 @@
 # taler-monitoring has moved
 
-The monitoring suite is no longer part of **koopa-admin-log**.
+The monitoring **suite** is a standalone repository (not maintained under this tree).
 
 | | |
 |--|--|
 | **Repository** | https://git.hacktivism.ch/hernani/taler-monitoring |
 | **Clone** | `git clone https://git.hacktivism.ch/hernani/taler-monitoring.git ~/src/taler-monitoring` |
-| **Tag** | `v1.0` (initial standalone release) |
-| **History** | `VERSIONS.md` in that repo |
+| **Install path** | `~/src/taler-monitoring` |
+| **Version** | `./taler-monitoring.sh --ver` (tags `vMAJOR.FEATURE.FIX`, e.g. v1.7.1) |
 
-## Quick start
+## Host-agent (user systemd on koopa)
 
 ```bash
-git clone https://git.hacktivism.ch/hernani/taler-monitoring.git ~/src/taler-monitoring
-cd ~/src/taler-monitoring
-./taler-monitoring.sh -d hacktivism.ch urls
-# host-agent (koopa):
-./host-agent/install-host-agent.sh
+~/src/taler-monitoring/host-agent/install-host-agent.sh
 ```
 
-Landing configs and Caddy site configs for GOA remain in **koopa-admin-log**
-(`configs/`). The host-agent path unit still watches those paths when present.
+## Public HTML (infra on this host)
 
-Do **not** add monitoring scripts back into this directory — develop and push
-against **taler-monitoring** only.
+Generated under `~/monitoring-sites-staging/`.  
+**Live** requires root publish + Caddy handles — see:
+
+- `2026/2026-07-18--monitoring-public-caddy.md`
+- `ISSUES.md` → **I-09**
+- Apply: `sudo ~/koopa-caddy/apply-monitoring-live.sh`
+
+Do not re-introduce the full suite under `scripts/taler-monitoring/`.