nginx setup with browser caching and redirect to www

nginx-server-setup.txt

# see: https://www.digitalocean.com/community/tutorials/how-to-implement-browser-caching-with-nginx-s-header-module-on-centos-7

# Expires map
map $sent_http_content_type $expires {
    default                    off;
    text/html                  epoch;
    text/css                   max;
    application/javascript     max;
    ~image/                    max;
}

server {
    listen 80;
    server_name domain.com;
    rewrite ^(.*) http://www.domain.com$1 permanent;
}

server {
    server_name www.domain.com;
    
    location / {
        proxy_pass http://localhost:9999;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    expires $expires;
}