我想使用Azure AD B2C的自定义域。正如Microsoft文档中所解释的那样，需要使用Azure Front Door来执行此操作。
为了避免支付这项服务，我想使用我自己的Web服务器/反向代理（Nginx）来做到这一点。我不明白为什么不能...
我尝试了这个配置，但它似乎不工作：

server {
    listen 443 ssl http2;
    server_name mydomain.com;

    include /etc/nginx/snippets/server.conf;
    include /etc/nginx/snippets/ssl.conf;

    # Disabling cache by default
    set $no_cache 1;

    # IDP Conf
    location / {
        proxy_pass https://xxx.b2clogin.com/;
        proxy_cache_bypass $http_upgrade;

        # Proxy headers
        proxy_set_header Upgrade           $http_upgrade;
        proxy_set_header Connection        "upgrade";
        proxy_set_header Host              $host;
        proxy_set_header X-Real-IP         $remote_addr;
        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host  $host;
        proxy_set_header X-Forwarded-Port  $server_port;
        proxy_cookie_domain xxx.b2clogin.com mydomain.com;
        sub_filter      "xxx.b2clogin.com"   $host;
    }
}

你有办法让它工作吗？