Nginx proxy Apache2 php ERR_CONNECTION_RESET - php

Question

I deployed an application in docker, which is a php application with apache2.
There is an nginx in docker, used to proxy to applications.
www.myhost.com -> nginx(docker) -> my application(docker)
If I request my application through host:port, it runs successfully.
When I request my application through domain name, it gets ERR_CONNECTION_RESET randomly.
net::ERR_CONNECTION_RESET 200 (OK)
server {
listen 80;
server_name myhost.com;
client_max_body_size 5120m;
location / {
#client_max_body_size 1024M;
#proxy_redirect off;
#proxy_set_header Host $http_host;
#proxy_set_header X-Real-IP $remote_addr;
#proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
#proxy_request_buffering off;
#proxy_buffering off;
proxy_redirect off;
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-Host $server_name;
proxy_pass http://192.168.17.19:8080/;
}
}

Answer 1

Use this config for Nginx server to use Nginx as a reverseproxy
upstream myhost {
server <docker-container-hostname/IP-address>:<port>
}
server {
listen 80;
server_name myhost.com;
location / {
proxy_pass http://myhost;
}
}