chore(security): remove committed secrets/dumps, .env-based config, hardened deploy webhook

- Delete backups/*.dump and all real credentials from README/docs
  (prod MinIO creds, Casdoor passwords, server IP, admin password)
- All stack secrets now come from git-ignored .env (.env.example added);
  docker-compose.prod.yml refuses to boot without them (${VAR:?})
- seed_casdoor.py: bcrypt password hashing, generated console/client secrets
- Harden infra/deploy-webhook: HMAC-verified Gitea webhook receiver
  + systemd unit + README (replaces unauthenticated deploy endpoint)
- docs/SECRET-MANAGEMENT.md: secret inventory + rotation checklist

docker-compose.yml

@@ -6,7 +6,9 @@ services:
     environment:
       POSTGRES_DB: procurement
       POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
+      # Local dev default; production overrides via .env (required by the
+      # prod overlay) — never commit real passwords.
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
 
     ports:
       - "5433:5432"
@@ -69,8 +71,8 @@ services:
     command: server /data --console-address ":9001"
 
     environment:
-      MINIO_ROOT_USER: minioadmin
-      MINIO_ROOT_PASSWORD: minioadmin
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minioadmin}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-minioadmin}
 
     ports:
       - "9000:9000"   # S3 API
@@ -110,8 +112,8 @@ services:
 
     environment:
       MINIO_ENDPOINT: minio:9000
-      MINIO_ROOT_USER: minioadmin
-      MINIO_ROOT_PASSWORD: minioadmin
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minioadmin}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-minioadmin}
       MINIO_BUCKET: procurement-files
 
     entrypoint: >
@@ -170,24 +172,30 @@ services:
     container_name: procurement-api
 
     environment:
-      PROCUREMENT_DATABASE_URL: postgresql+asyncpg://postgres:postgres@postgres:5432/procurement
+      PROCUREMENT_DATABASE_URL: postgresql+asyncpg://postgres:${POSTGRES_PASSWORD:-postgres}@postgres:5432/procurement
       PROCUREMENT_MINIO_ENDPOINT: minio:9000
-      PROCUREMENT_MINIO_ACCESS_KEY: minioadmin
-      PROCUREMENT_MINIO_SECRET_KEY: minioadmin
+      PROCUREMENT_MINIO_ACCESS_KEY: ${MINIO_ROOT_USER:-minioadmin}
+      PROCUREMENT_MINIO_SECRET_KEY: ${MINIO_ROOT_PASSWORD:-minioadmin}
       PROCUREMENT_MINIO_BUCKET: procurement-files
       PROCUREMENT_MINIO_SECURE: "false"
+      # "dev" enables the local defaults; "prod" turns on the fail-fast
+      # startup checks (no wildcard CORS, no default credentials).
+      PROCUREMENT_ENVIRONMENT: ${ENVIRONMENT:-dev}
+      PROCUREMENT_DEV_LOGIN_ENABLED: ${DEV_LOGIN_ENABLED:-false}
+      # Comma-separated browser origins (JSON-free .env friendly).
+      PROCUREMENT_CORS_ORIGINS: ${CORS_ORIGINS:-http://localhost,http://localhost:3000,http://localhost:5173}
       # Casdoor: endpoint is the in-network service URL; the issuer must match
       # the origin Casdoor advertises to browsers (its OIDC discovery doc).
       PROCUREMENT_CASDOOR_ENDPOINT: http://casdoor:8000
-      PROCUREMENT_CASDOOR_ISSUER: http://localhost:8080
+      PROCUREMENT_CASDOOR_ISSUER: ${CASDOOR_ISSUER:-http://localhost:8080}
       PROCUREMENT_CASDOOR_CLIENT_ID: inventory-app-client
-      PROCUREMENT_CASDOOR_CLIENT_SECRET: inventory-app-secret-2026
+      PROCUREMENT_CASDOOR_CLIENT_SECRET: ${CASDOOR_CLIENT_SECRET:-inventory-app-secret-2026}
       PROCUREMENT_CASDOOR_ORGANIZATION: inventory
       PROCUREMENT_CASDOOR_APP_NAME: inventory-app
       PROCUREMENT_CASDOOR_AUDIENCE: inventory-app-client
       # Console admin used by POST /users/sync (identity mirroring).
       PROCUREMENT_CASDOOR_ADMIN_USER: admin
-      PROCUREMENT_CASDOOR_ADMIN_PASSWORD: "123"
+      PROCUREMENT_CASDOOR_ADMIN_PASSWORD: ${CASDOOR_ADMIN_PASSWORD:-123}
 
     ports:
       - "8000:8000"
@@ -214,8 +222,9 @@ services:
     build:
       context: ./frontend
       args:
-        # Developer Mode panel on the login page — set false for production.
-        DEV_LOGIN_ENABLED: ${DEV_LOGIN_ENABLED:-true}
+        # Developer Mode panel on the login page — dev-only aid. Production
+        # builds MUST leave this false (identity comes from Casdoor tokens).
+        DEV_LOGIN_ENABLED: ${DEV_LOGIN_ENABLED:-false}
     container_name: procurement-frontend
 
     labels: