Support root path

Author: mattgodbolt

app/config.py

@@ -3,6 +3,7 @@
 
 class Settings(BaseSettings):
     anthropic_api_key: str
+    root_path: str = ""
     model_config = SettingsConfigDict(env_file=".env")
 
 

app/main.py

@@ -9,7 +9,8 @@
 logger = logging.getLogger()
 logger.setLevel(logging.INFO)
 
-app = FastAPI()
+# TODO consider https://github.com/FanchenBao/fastapi_lambda_api-gateway_sample/blob/main/app/main.py for CORS
+app = FastAPI(root_path=settings.root_path)
 handler = Mangum(app)
 
 anthropic_client = Anthropic(api_key=settings.anthropic_api_key)