A simple setup for using a reverse proxy in micro services

reverse-nginx-proxy.conf

# EXAMPLEONE
upstream exampleone {
    server host-ip:3000;
}

# EXAMPLETWO
upstream exampletwo {
    server host-ip:3001;
}

server {
    listen 80 default;
    listen [::]:80 default;

    server_name ~^(?<api>\w+)\.URL\.PATH$;

    access_log  /var/log/nginx/proxy.access.log;
    error_log  /var/log/nginx/proxy.error.log;

    client_max_body_size 50M;

    location / {
        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-Proto $scheme;
        proxy_set_header        Host $http_x_forwarded_host;
        proxy_set_header        Upgrade $http_upgrade;
        proxy_set_header        Connection "upgrade";

        proxy_connect_timeout   1;
        proxy_send_timeout      30;
        proxy_read_timeout      30;

        proxy_bind $server_addr;
        proxy_pass http://$api;
    }
}