图片无法上传到服务器上

<!-- 示例HTML代码 -->
<form action="/upload" method="post" enctype="multipart/form-data">
  <input type="file" name="file" />
  <input type="submit" value="Upload" />
</form>

# 示例Python代码（Flask）
from flask import Flask, request

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload_file():
    if 'file' not in request.files:
        return 'No file part'
    file = request.files['file']
    if file.filename == '':
        return 'No selected file'
    if file:
        file.save(os.path.join('uploads', file.filename))
        return 'File successfully uploaded'

if __name__ == '__main__':
    app.run(debug=True)

# 示例Nginx配置
http {
  client_max_body_size 10M;
}