cache.conf

proxy_cache_path /etc/nginx/cache levels=1:2 keys_zone=thumb_cache:8m max_size=10g inactive=60m use_temp_path=off;
proxy_cache_valid 200 30m;
proxy_cache_key $host$uri$is_args$args;

server {
  listen 80 default_server;
  client_max_body_size 250M;

  # The IP of a hard-coded server name in a 'proxy_pass' directive is resolved
  # only when Nginx starts, but the IP (or IPs) of Docker containers may change
  # when Docker redeploys or scales them. Putting a server's name in a variable
  # causes Nginx to resolve it dynamically.
  resolver 127.0.0.11 valid=2s ipv6=off;
  set $avalon_backend avalon;

#  location ~ /master_files/(?<mfid>.+)/thumbnail {
#    add_header X-Cached $upstream_cache_status;
#    proxy_ignore_headers "Set-Cookie";
#    proxy_hide_header "Set-Cookie";
#    proxy_ignore_headers Cache-Control;
#
#    proxy_cache thumb_cache;
#    proxy_pass http://$avalon_backend:3000/master_files/$mfid/thumbnail;
#  }
#
#  location ~ /master_files/(?<mfid>.+)/poster {
#    add_header X-Cached $upstream_cache_status;
#    proxy_ignore_headers "Set-Cookie";
#    proxy_hide_header "Set-Cookie";
#    proxy_ignore_headers Cache-Control;
#
#    proxy_cache thumb_cache;
#    proxy_pass http://$avalon_backend:3000/master_files/$mfid/poster;
#  }

  location /assets {
    add_header X-Cached $upstream_cache_status;

    proxy_cache thumb_cache;
    proxy_pass http://$avalon_backend:3000$uri;
  }

  location /packs {
    add_header X-debug-message "trying to cache" always;
    add_header X-Cached $upstream_cache_status;

    proxy_cache thumb_cache;
    proxy_pass http://$avalon_backend:3000$uri;
  }

  location / {
    proxy_pass http://$avalon_backend:3000;

    proxy_read_timeout 30m;    # Default: 60s.

    proxy_set_header  Host $host;
    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header  X-Forwarded-Proto $scheme;
    proxy_set_header  X-Forwarded-Ssl on; # Optional
    proxy_set_header  X-Forwarded-Port $server_port;
    proxy_set_header  X-Forwarded-Host $host;
  }
}