add content-type and accept

mirrors header values set by ollama cli

Author: mxyng

ollama/_client.py

@@ -47,7 +47,9 @@ def __init__(
     """
 
     headers = kwargs.pop('headers', {})
-    headers['user-agent'] = f'ollama-python/{__version__} ({platform.machine()} {platform.system().lower()}) Python/{platform.python_version()}'
+    headers['Content-Type'] = 'application/json'
+    headers['Accept'] = 'application/json'
+    headers['User-Agent'] = f'ollama-python/{__version__} ({platform.machine()} {platform.system().lower()}) Python/{platform.python_version()}'
 
     self._client = client(
       base_url=_parse_host(host or os.getenv('OLLAMA_HOST')),