prepare fastapi root layout for server deployment

.env.example

@@ -1,32 +1,32 @@
 APP_NAME=Medical Consultation Agent
 APP_ENV=local
 APP_DEBUG=true
+APP_ROOT_PATH=
 API_V1_PREFIX=/api/v1
-APP_HOST=127.0.0.1
-APP_PORT=9000
 
-# MySQL
-# MYSQL_URL keeps the original async style URL for future async SQLAlchemy.
-# DATABASE_URL is optional; the current sync backend will normalize MYSQL_URL to mysql+pymysql automatically.
-MYSQL_URL=mysql+aiomysql://root:<password>@mysql:3306/medical_platform?charset=utf8mb4
-DATABASE_URL=mysql+pymysql://root:<password>@mysql:3306/medical_platform?charset=utf8mb4
-
-# Redis
+# Local MySQL and Redis
+DATABASE_URL=mysql+pymysql://root:CHANGE_ME@127.0.0.1:3306/medical?charset=utf8mb4
 RUNTIME_MEMORY_BACKEND=redis
-REDIS_URL=redis://redis:6379/0
+RUNTIME_MEMORY_FALLBACK_ENABLED=true
 RUNTIME_MEMORY_TTL_SECONDS=7200
+REDIS_URL=redis://127.0.0.1:6379/0
 
-# Django user center auth for frontend integration
-AUTH_USER_ME_URL=http://django:8000/api/user/users/me/
+# Django user center
+AUTH_VALIDATE_ENABLED=true
+AUTH_USER_ME_URL=http://127.0.0.1:8000/api/user/users/me/
 AUTH_TIMEOUT_SECONDS=5
 AUTH_CACHE_TTL_SECONDS=300
 
+# Browser origins, separated by commas
+CORS_ALLOW_ORIGINS=http://127.0.0.1:5173,http://localhost:5173
+CORS_ALLOW_ORIGIN_REGEX=^http://(127\.0\.0\.1|localhost|192\.168\.\d+\.\d+):\d+$
+
 # OpenAI-compatible LLM
 LLM_BASE_URL=https://api.deepseek.com/chat/completions
 LLM_API_KEY=
-LLM_MODEL=deepseek-v4-pro
-LLM_FAST_MODEL=deepseek-v4-pro
-LLM_REASON_MODEL=deepseek-v4-pro
+LLM_MODEL=deepseek-chat
+LLM_FAST_MODEL=deepseek-chat
+LLM_REASON_MODEL=deepseek-reasoner
 LLM_TIMEOUT_SECONDS=45
 LLM_CHAT_TIMEOUT_SECONDS=20
 LLM_STREAM_FIRST_TOKEN_TIMEOUT_SECONDS=15