Nginx

Redirect HTTP to HTTPS

Create /etc/ngix/sites-available/RedirectHTTPtoHTTPS.conf

server {
    listen 80;
    rewrite ^(.*) https://$host$1 permanent;
}

enable it with ln -s /etc/ngix/sites-available/RedirectHTTPtoHTTPS.conf /etc/ngix/sites-available/RedirectHTTPtoHTTPS
Restart Nginx service: sudo service nginx restart

Password protected

Create a /etc/nginx/.htpasswd

sudo sh -c "echo -n 'sammy:' >> /etc/nginx/.htpasswd"
sudo sh -c "openssl passwd -apr1 >> /etc/nginx/.htpasswd"  # you will be prompt for password

sudo nano /etc/nginx/sites-enabled/default

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;

    root /usr/share/nginx/html;
    index index.html index.htm;

    server_name localhost;

    location / {
        try_files $uri $uri/ =404;
        auth_basic "Restricted Content";
        auth_basic_user_file /etc/nginx/.htpasswd;
    }
}