ci(portal-self-service): serve the self-service app in compose (refs #68)

Add the self-service nginx service (build the app image, depends_on bff healthy +
keycloak started, health-checked, host port 8140). Add it to WAIT_SVCS and the CI
log dump.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

infra/docker-compose.yml

@@ -433,6 +433,30 @@ services:
         condition: service_healthy
     networks: [cg]
 
+  # ── Self-Service portal (S-08d) ────────────────────────────────────────────
+  # nginx serves the Angular app and reverse-proxies /self-service + /openbaar to the BFF
+  # (same-origin, no CORS). The Playwright e2e drives it inside this network so the DigiD
+  # token issuer (keycloak:8080) matches the BFF's authority (ADR-0010).
+  self-service:
+    build:
+      context: ..
+      dockerfile: apps/self-service/Dockerfile
+    image: register-referentie/self-service:dev
+    ports:
+      - "8140:80"
+    healthcheck:
+      test: ["CMD-SHELL", "wget -q -O /dev/null http://localhost/ || exit 1"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 10s
+    depends_on:
+      bff:
+        condition: service_healthy
+      keycloak:
+        condition: service_started
+    networks: [cg]
+
 volumes:
   oz-db:
   nrc-db: