修改配置文件 vim /etc/nginx/sites-available/default，增加
client_max_body_size 1000m;//最大上传大小 proxy_connect_timeout 300s;//连接超时 proxy_send_timeout 300s;//连接超时 proxy_read_timeout 300s;//连接超时
server {
listen 80;
location / {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
client_max_body_size 1000m;
proxy_connect_timeout 300s;
proxy_send_timeout 300s;
proxy_read_timeout 300s;
}
}
解决 413 Request Entity Too Large
原文：https://www.cnblogs.com/fireicesion/p/10942997.html