fix #3602

Former-commit-id: 1518b45490606ea200482da4737113c46985e8c5

src/api.py

@@ -0,0 +1,19 @@
+import os
+
+import uvicorn
+
+from llmtuner.api.app import create_app
+from llmtuner.chat import ChatModel
+
+
+def main():
+    chat_model = ChatModel()
+    app = create_app(chat_model)
+    api_host = os.environ.get("API_HOST", "0.0.0.0")
+    api_port = int(os.environ.get("API_PORT", "8000"))
+    print("Visit http://localhost:{}/docs for API document.".format(api_port))
+    uvicorn.run(app, host=api_host, port=api_port)
+
+
+if __name__ == "__main__":
+    main()