1. clone from github and go to directory git clone https://github.com/yusufgurdogan/learn-english/ && cd learn-english

2. install flask pip3 install flask

3. run app python3 app.py app runs on port 1234. visit http://localhost:1234 from your browser.

4. (from now on, it's optional) install nginx to use it with a domain name. apt-get install nginx

(Nginx kurulumu için Türkçe anlatım: https://yusufgurdogan.com/nginx-ile-web-sunucusu-kurulumu/)

5. delete default nginx config and create your own config: rm /etc/nginx/sites-available/default && nano /etc/nginx/sites-available/default
6. paste the following config to here:

server {
    listen 80;
    server_name example.com; # enter your own domain name
    # if you don't want to enter a domain name:
    # server_name _;
    location / {
        proxy_pass http://localhost:1234;
        proxy_set_header Host $host;
    }
}

7. "CTRL+X" and "y" and press enter to save the file.
8. (optional) Get https for the domain sudo add-apt-repository ppa:certbot/certbot sudo apt install -y python-certbot-nginx sudo certbot --nginx
9. Enter your e-mail, enter 1 to accept the agreement, after that, you may enter N to reject getting notifications to your e-mail.
10. Select your domain name, press enter. If everything is fine, you should be able to browse https://(yourdomainname).com