update readme, fix web ui postprocess

Former-commit-id: ba51ab3379100108f7b52a3c2444ccdd99e8a6ef

src/llmtuner/webui/chat.py

@@ -90,6 +90,8 @@ class WebChatModel(ChatModel):
             yield chatbot, new_history
 
     def postprocess(self, response: str) -> str:
-        response = response.replace("<", "&lt;")
-        response = response.replace(">", "&gt;")
-        return response
+        blocks = response.split("```")
+        for i, block in enumerate(blocks):
+            if i % 2 == 0:
+                blocks[i] = block.replace("<", "&lt;").replace(">", "&gt;")
+        return "```".join(blocks)

src/llmtuner/webui/interface.py

@@ -55,4 +55,4 @@ def create_ui() -> gr.Blocks:
 if __name__ == "__main__":
     demo = create_ui()
     demo.queue()
-    demo.launch(server_name="0.0.0.0", share=False, inbrowser=True)
+    demo.launch(server_name="0.0.0.0", server_port=7860, share=False, inbrowser=True)