nginx-default.conf

server {
    listen 80;
    listen 443 ssl;
    server_name localhost;
    http2 on;

    charset utf-8;

    ssl_certificate /usr/nginx/ssl.crt;
    ssl_certificate_key /usr/nginx/ssl.key;

    location / {
        root /usr/src/app/www;
        # Try the static files first and then proxy to the app server
        try_files $uri @app;
    }

    location @app {
        proxy_set_header Host               $host;
        proxy_set_header X-Real-IP          $http_x_forwarded_for;
        proxy_set_header X-Forwarded-For    $http_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto  $http_x_forwarded_proto;
        proxy_set_header X-Forwarded-Host   $host;
        proxy_set_header X-Forwarded-Prefix "";
        proxy_set_header X-Proxy-Name       nginx;

        proxy_read_timeout          120s;

        proxy_http_version          1.1;
        proxy_set_header            Connection "";
        proxy_pass                  http://app;
    }
}

upstream app {
    # Server in the app container
    server app:3000;
    keepalive 4;

    zone upstream_app 1m;
}