Log keyboard interruption errors and stack traces for better debugging of server shutdowns

logs/gradio_web_server.log

@@ -107,3 +107,42 @@ Please help me analyze this picture.
 2025-01-16 17:14:27 | INFO | gradio_web_server | ==== AI response ====
 This is a test response▌
 2025-01-16 17:14:27 | INFO | gradio_web_server | This is a test response
+2025-01-16 18:09:23 | INFO | stdout | Keyboard interruption in main thread... closing server.
+2025-01-16 18:09:23 | ERROR | stderr | Traceback (most recent call last):
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/gradio/blocks.py", line 2664, in block_thread
+2025-01-16 18:09:23 | ERROR | stderr |     time.sleep(0.1)
+2025-01-16 18:09:23 | ERROR | stderr | KeyboardInterrupt
+2025-01-16 18:09:23 | ERROR | stderr | 
+2025-01-16 18:09:23 | ERROR | stderr | During handling of the above exception, another exception occurred:
+2025-01-16 18:09:23 | ERROR | stderr | 
+2025-01-16 18:09:23 | ERROR | stderr | Traceback (most recent call last):
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/Workspace/5CD_data/huggingface/Vintern-1B/app.py", line 613, in <module>
+2025-01-16 18:09:23 | ERROR | stderr |     server_name=args.host,
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/gradio/blocks.py", line 2569, in launch
+2025-01-16 18:09:23 | ERROR | stderr |     self.block_thread()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/gradio/blocks.py", line 2668, in block_thread
+2025-01-16 18:09:23 | ERROR | stderr |     self.server.close()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/gradio/http_server.py", line 68, in close
+2025-01-16 18:09:23 | ERROR | stderr |     self.thread.join(timeout=5)
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 1064, in join
+2025-01-16 18:09:23 | ERROR | stderr |     self._wait_for_tstate_lock(timeout=max(timeout, 0))
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 1080, in _wait_for_tstate_lock
+2025-01-16 18:09:23 | ERROR | stderr |     if lock.acquire(block, timeout):
+2025-01-16 18:09:23 | ERROR | stderr | KeyboardInterrupt
+2025-01-16 18:09:23 | ERROR | stderr | Error in atexit._run_exitfuncs:
+2025-01-16 18:09:23 | ERROR | stderr | Traceback (most recent call last):
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/weakref.py", line 667, in _exitfunc
+2025-01-16 18:09:23 | ERROR | stderr |     f()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/weakref.py", line 591, in __call__
+2025-01-16 18:09:23 | ERROR | stderr |     return info.func(*info.args, **(info.kwargs or {}))
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/urllib3/connectionpool.py", line 1180, in _close_pool_connections
+2025-01-16 18:09:23 | ERROR | stderr |     conn.close()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/Users/huynhbao/.virtualenvs/huggingface/lib/python3.9/site-packages/urllib3/connection.py", line 318, in close
+2025-01-16 18:09:23 | ERROR | stderr |     super().close()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/http/client.py", line 965, in close
+2025-01-16 18:09:23 | ERROR | stderr |     sock.close()   # close it manually... there may be other refs
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/socket.py", line 501, in close
+2025-01-16 18:09:23 | ERROR | stderr |     self._real_close()
+2025-01-16 18:09:23 | ERROR | stderr |   File "/usr/local/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/ssl.py", line 1300, in _real_close
+2025-01-16 18:09:23 | ERROR | stderr |     self._sslobj = None
+2025-01-16 18:09:23 | ERROR | stderr | KeyboardInterrupt