proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Port $server_port;
proxy_set_header X-Forwarded-Scheme $scheme;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Accept-Encoding "";
proxy_set_header Host $host;

proxy_set_header Early-Data $ssl_early_data;
proxy_buffering off;
proxy_request_buffering off;

proxy_next_upstream error timeout invalid_header http_500;
proxy_next_upstream_timeout 3s;
proxy_next_upstream_tries 2;

client_body_buffer_size 512k;
proxy_read_timeout 86400s;
client_max_body_size 0;

# Websocket
proxy_http_version 1.1;
proxy_cache_bypass  $http_upgrade;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";