docs: update README with YAML configuration instructions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -6,4 +6,7 @@ __pycache__/
 dist/
 build/
 .pytest_cache/
-.claude/
+.claude/
+
+# Local configuration overrides
+config/settings.local.yaml

README.md

@@ -11,3 +11,25 @@ source .venv/bin/activate  # Linux/Mac
 pip install -r requirements.txt
 uvicorn app.main:app --reload
 ```
+
+## Configuration
+
+Configuration is managed via YAML files in the `config/` directory.
+
+### Configuration File
+
+Edit `config/settings.yaml` to configure your environment:
+
+```yaml
+database:
+  sql_server:
+    host: your-host
+    port: 1433
+    database: your-database
+    username: your-username
+    password: your-password
+```
+
+### Local Overrides
+
+For local development, create `config/settings.local.yaml` to override specific values without committing them.

app/core/config.py

@@ -1,32 +0,0 @@
-from sqlalchemy.engine import URL
-from pydantic_settings import BaseSettings, SettingsConfigDict
-
-
-class Settings(BaseSettings):
-    SQL_SERVER_HOST: str
-    SQL_SERVER_PORT: int = 1433
-    SQL_SERVER_DATABASE: str
-    SQL_SERVER_USERNAME: str
-    SQL_SERVER_PASSWORD: str
-    SQL_SERVER_DRIVER: str = "{ODBC Driver 18 for SQL Server}"
-    SQL_SERVER_TRUST_SERVER_CERTIFICATE: str = "yes"
-
-    @property
-    def database_url(self) -> URL:
-        return URL.create(
-            "mssql+pyodbc",
-            username=self.SQL_SERVER_USERNAME,
-            password=self.SQL_SERVER_PASSWORD,
-            host=self.SQL_SERVER_HOST,
-            port=self.SQL_SERVER_PORT,
-            database=self.SQL_SERVER_DATABASE,
-            query={
-                "driver": self.SQL_SERVER_DRIVER.strip("{}"),
-                "TrustServerCertificate": self.SQL_SERVER_TRUST_SERVER_CERTIFICATE,
-            },
-        )
-
-    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
-
-
-settings = Settings()

app/main.py

@@ -1,7 +1,21 @@
+import sys
+
 from fastapi import FastAPI, Request
 from fastapi.exceptions import RequestValidationError
 from fastapi.responses import JSONResponse
 
+from config.settings import load_settings
+
+# 加载配置文件，失败则退出
+try:
+    settings = load_settings()
+except FileNotFoundError as e:
+    print(f"配置文件错误: {e}")
+    sys.exit(1)
+except Exception as e:
+    print(f"加载配置失败: {e}")
+    sys.exit(1)
+
 from app.api.v1.location import router as location_router
 from app.api.v1.box import router as box_router
 from app.services.location_service import DuplicateLocationError