Nginx vhost redirect to another host

nginx.conf

server {
    listen 80;
    # Change domain
    server_name domain.tld;

    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    # Change domain
    server_name domain.tld;

    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem;

    location ^~ / {
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Forwarded-Host $http_host;
      proxy_set_header X-Forwarded-Uri $request_uri;
      proxy_set_header X-Forwarded-Ssl on;
      proxy_set_header X-Forwarded-For $remote_addr;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Connection "";

      client_body_buffer_size 128k;
      proxy_next_upstream error timeout invalid_header http_500 http_502 http_503; ## Timeout if the real server is dead.
      proxy_redirect  http://  $scheme://;
      proxy_http_version 1.1;
      proxy_cache_bypass $cookie_session;
      proxy_no_cache $cookie_session;
      proxy_buffers 64 256k;

      real_ip_header X-Forwarded-For;
      real_ip_recursive on;

      send_timeout 5m;
      proxy_read_timeout 360;
      proxy_send_timeout 360;
      proxy_connect_timeout 360;
      
      # Change IP
      set $upstream_host https://0.0.0.1;
      proxy_pass $upstream_host;
    }
}