Beego Nginx 反向代理和 HTTPS 配置后图片资源无法访问，如何排查问题？

server {
    listen       443 ssl;
    server_name  mp.yitiegongfang.com; #你的域名

    # 配置https
    ssl_certificate /www/crt/1_mp.yitiegongfang.com_bundle.crt; #你申请的nginx中的ssl证书
    ssl_certificate_key /www/crt/2_mp.yitiegongfang.com.key;     #你申请的nginx中的key
    ssl_session_timeout 5m;
    ssl_protocols tlsv1 tlsv1.1 tlsv1.2;
    ssl_ciphers ecdhe-rsa-aes128-gcm-sha256:high:!anull:!md5:!rc4:!dhe;
    ssl_prefer_server_ciphers on;

    charset utf-8;
    access_log  /root/go/src/easy_wallpaper_api/access.log; #该目录建议是你的部署文件目录

    location /(css|js|fonts|img)/ {
        access_log off;
        expires 1d;

        root "/root/go/src/easy_wallpaper_api/static";#该文件是你beego项目中的static静态文件路径
        try_files $uri @backend;
    }

    location / {
        try_files /_not_exists_ @backend;
    }

    location @backend {
        proxy_set_header x-``forwarded-for $remote_addr;
        proxy_set_header host            $http_host;

        proxy_pass http://127.0.0.1:8066;  #代理指向的beego项目地址
    }
}

server_name mp.yitiegongfang.com;