docs: clarify Logto proxy setup and ENDPOINT/ADMIN_ENDPOINT semantics

LOGTO_ENDPOINT and LOGTO_ADMIN_ENDPOINT are public-facing URLs that
Logto uses for OIDC discovery, issuer URI, and redirects. When behind
a reverse proxy (e.g., Traefik), set these to the external URLs.
Logto requires its own subdomain (not a path prefix).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

HOWTO.md

@@ -160,30 +160,32 @@ curl -s -X DELETE http://localhost:8081/api/v1/admin/oidc \
 
 Logto is deployed alongside the Cameleer stack. After first deployment:
 
-1. **Initial setup**: Open `http://192.168.50.86:30952` (admin console) and create the admin account
+Logto is proxy-aware via `TRUST_PROXY_HEADER=1`. The `LOGTO_ENDPOINT` and `LOGTO_ADMIN_ENDPOINT` secrets define the public-facing URLs that Logto uses for OIDC discovery, issuer URI, and redirect URLs. When behind a reverse proxy (e.g., Traefik), set these to the external URLs (e.g., `https://auth.cameleer.my.domain`). Logto needs its own subdomain — it cannot be path-prefixed under another app.
+
+1. **Initial setup**: Open the Logto admin console (the `LOGTO_ADMIN_ENDPOINT` URL) and create the admin account
 2. **Create SPA application**: Applications → Create → Single Page App
    - Name: `Cameleer UI`
-   - Redirect URI: `http://192.168.50.86:30090/oidc/callback` (or your UI URL)
+   - Redirect URI: your UI URL + `/oidc/callback`
    - Note the **Client ID**
 3. **Create API Resource**: API Resources → Create
    - Name: `Cameleer Server API`
-   - Indicator: `https://cameleer.siegeln.net/api` (or your API URL)
+   - Indicator: your API URL (e.g., `https://cameleer.siegeln.net/api`)
    - Add permissions: `admin`, `operator`, `viewer`
 4. **Create M2M application** (for SaaS platform): Applications → Create → Machine-to-Machine
    - Name: `Cameleer SaaS`
    - Assign the API Resource created above with `admin` scope
    - Note the **Client ID** and **Client Secret**
-5. **Configure Cameleer**: Use the admin API (`PUT /api/v1/admin/oidc`) or set env vars for initial seeding:
+5. **Configure Cameleer OIDC login**: Use the admin API (`PUT /api/v1/admin/oidc`) or set env vars for initial seeding:
    ```
    CAMELEER_OIDC_ENABLED=true
-   CAMELEER_OIDC_ISSUER=http://logto:3001/oidc
+   CAMELEER_OIDC_ISSUER=<LOGTO_ENDPOINT>/oidc
    CAMELEER_OIDC_CLIENT_ID=<client-id-from-step-2>
    CAMELEER_OIDC_CLIENT_SECRET=<not-needed-for-public-spa>
    ```
 6. **Configure resource server** (for M2M token validation):
    ```
-   CAMELEER_OIDC_ISSUER_URI=http://logto:3001/oidc
-   CAMELEER_OIDC_AUDIENCE=https://cameleer.siegeln.net/api
+   CAMELEER_OIDC_ISSUER_URI=<LOGTO_ENDPOINT>/oidc
+   CAMELEER_OIDC_AUDIENCE=<api-resource-indicator-from-step-3>
    ```
 
 ### User Management (ADMIN only)
@@ -467,14 +469,14 @@ cameleer-demo namespace:
 | Server API | `http://192.168.50.86:30081/api/v1/health` |
 | Swagger UI | `http://192.168.50.86:30081/api/v1/swagger-ui.html` |
 | Deploy Demo | `http://192.168.50.86:30092` |
-| Logto API | `http://192.168.50.86:30951` |
-| Logto Admin | `http://192.168.50.86:30952` |
+| Logto API | `LOGTO_ENDPOINT` secret (NodePort 30951 direct, or behind reverse proxy) |
+| Logto Admin | `LOGTO_ADMIN_ENDPOINT` secret (NodePort 30952 direct, or behind reverse proxy) |
 
 ### CI/CD Pipeline
 
 Push to `main` triggers: **build** (UI npm + Maven, unit tests) → **docker** (buildx amd64 for server + UI, push to Gitea registry) → **deploy** (kubectl apply + rolling update).
 
-Required Gitea org secrets: `REGISTRY_TOKEN`, `KUBECONFIG_BASE64`, `CAMELEER_AUTH_TOKEN`, `CAMELEER_JWT_SECRET`, `POSTGRES_USER`, `POSTGRES_PASSWORD`, `POSTGRES_DB`, `CLICKHOUSE_USER`, `CLICKHOUSE_PASSWORD`, `CAMELEER_UI_USER` (optional), `CAMELEER_UI_PASSWORD` (optional), `LOGTO_PG_USER`, `LOGTO_PG_PASSWORD`, `LOGTO_ENDPOINT`, `LOGTO_ADMIN_ENDPOINT`, `CAMELEER_OIDC_ENABLED`, `CAMELEER_OIDC_ISSUER`, `CAMELEER_OIDC_CLIENT_ID`, `CAMELEER_OIDC_CLIENT_SECRET`, `CAMELEER_OIDC_ISSUER_URI` (optional), `CAMELEER_OIDC_AUDIENCE` (optional).
+Required Gitea org secrets: `REGISTRY_TOKEN`, `KUBECONFIG_BASE64`, `CAMELEER_AUTH_TOKEN`, `CAMELEER_JWT_SECRET`, `POSTGRES_USER`, `POSTGRES_PASSWORD`, `POSTGRES_DB`, `CLICKHOUSE_USER`, `CLICKHOUSE_PASSWORD`, `CAMELEER_UI_USER` (optional), `CAMELEER_UI_PASSWORD` (optional), `LOGTO_PG_USER`, `LOGTO_PG_PASSWORD`, `LOGTO_ENDPOINT` (public-facing Logto URL, e.g., `https://auth.cameleer.my.domain`), `LOGTO_ADMIN_ENDPOINT` (admin console URL), `CAMELEER_OIDC_ISSUER_URI` (optional, for resource server M2M token validation), `CAMELEER_OIDC_AUDIENCE` (optional, API resource indicator).
 
 ### Manual K8s Commands