Ошибка Nginx 502 Bad Gateway на инстансе EC2 с dango

Я использую Nginx в моем экземпляре EC2 для присоединения моего домена с маршрута 53 к моему приложению Django, которое запущено в контейнере docker, оно работало абсолютно нормально, но когда я перемещаю свою базу данных на RDS и после перемещения мое приложение не работает там, Nginx выдает ошибку, приведенную ниже:

2022/04/07 21:15:40 [error] 9#9: *3 connect() failed (111: Connection refused) while connecting to upstream, client: 202.47.34.198, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "uwsgi://172.20.0.3:9000", host: "sub.domain.com", referrer: "http://sub.domain.com/"

.

/etc/nginx/sites-available/default

server {
    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.nginx-debian.html;

    server_name sub.domain.com;

    location / {
        proxy_pass http://localhost:80;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        client_max_body_size 100M;
    }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/sub.domain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/sub.domain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = sub.domain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 8080 default_server;
    listen [::]:8080 default_server;

    server_name sub.domain.com;
    return 404; # managed by Certbot
}

netstat -tulpn | grep LISTEN

(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:40743         0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      -                   
tcp6       0      0 :::8080                 :::*                    LISTEN      -                   
tcp6       0      0 :::80                   :::*                    LISTEN      -                   
tcp6       0      0 :::22                   :::*                    LISTEN      -                   
tcp6       0      0 :::443                  :::*                    LISTEN      - 

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