feat(security): opt-in local CrowdSec LAPI bouncer on the Docker engine

.env.example

@@ -112,6 +112,21 @@ CROWDSEC_REPORT_ENROLL_KEY=
 # Central API base — override only for tests/staging.
 CROWDSEC_CAPI_BASE_URL=https://api.crowdsec.net/v3
 
+# --- CROWDSEC LOCAL (opt-in engine on this Docker host, no proxy changes) ---
+# App-layer LAPI bouncer: the anti-DDoS gate asks the local engine per client
+# IP (short-cached) and blocks ban/captcha decisions before its own buckets.
+# Start everything with `bash cms security`; it writes the key below into .env
+# and starts the CrowdSec engine bound to 127.0.0.1. Set to "true" to load the
+# bouncer without the local engine (not recommended).
+CROWDSEC_LOCAL_ENABLED=false
+# Host access-log directory mounted into the engine for detection (Nginx only).
+CROWDSEC_NGINX_LOG_DIR=/var/log/nginx
+# Change LAPI port AND LAPI URL together when 18080 is already taken.
+CROWDSEC_LAPI_PORT=18080
+CROWDSEC_LAPI_URL=http://127.0.0.1:18080
+# Generated by `bash cms security`; keep in .env, never commit a value.
+CROWDSEC_LAPI_API_KEY=
+
 # --- PATHS ---
 BADGE_UPLOAD_DIR=./public/assets/images/badges
 EMULATOR_JAR_PATH=./emulator/Arcturus.jar