Implemented universal logout

roles/web-svc-logout/templates/env.j2

@@ -0,0 +1,14 @@
+# Comma‑separated list of all subdomains to log out (no spaces)
+LOGOUT_DOMAINS={{ logout_domains }}
+
+# Port the logout service will listen on inside the container
+LOGOUT_PORT={{ container_port }}
+
+# (Optional) If you’re using docker‑compose, you can also define:
+#HOST_LOGOUT_PORT=8080
+#HOST_NGINX_HTTP_PORT=80
+#HOST_NGINX_HTTPS_PORT=443
+
+# (For the Nginx Jinja2 proxy snippet)
+#LOGOUT_SERVICE_HOST=logout-service
+#LOGOUT_SERVICE_PORT=8000