proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=app_cache:10m;
proxy_cache_key "$scheme$request_method$host$request_uri";

server {
	listen [::]:80 default_server;
	listen 80 default_server;
	server_name _;
	location / {
		add_header X-Cache-Status $upstream_cache_status;
		proxy_pass http://localhost:9001;
		proxy_cache app_cache;
		proxy_cache_bypass $http_no_cache;
	}
}


# server 01
server {
	listen [::]:9001;
	listen 9001;
	server_name _;
	# nginx will use Cache-Control and expires to manage cache
	add_header Cache-Control "public";
	expires 30d;
	add_header Content-Type "text/plain";
	return 200 "hello world: server 01";
}

docker run --detach --name nginx-cached-proxy \
    --volume "${PWD}/cached-proxy.conf:/etc/nginx/conf.d/default.conf" \
    --publish "8080:80" \
    --workdir "/usr/share/nginx/html/" \
    nginx
curl -SsD- http://localhost:8080/
curl -SsD- http://localhost:8080/
curl -SsD- -H "No-Cache: 1" http://localhost:8080/
docker stop nginx-cached-proxy
docker rm nginx-cached-proxy