You can install this repository by calling following commands:
```bash
# wget -O - https://deb.adamhlavacek.com/pub.gpg | sudo apt-key add - &&  # folder older systems only, the next command is for newer
wget -O - https://deb.adamhlavacek.com/pub.gpg | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/deb-adamhlavacek-com.gpg &&
echo "deb https://deb.adamhlavacek.com ./" | sudo tee -a /etc/apt/sources.list &&
sudo apt update
```