1.
Install Java 17 on Ububntu 20.04 or 18.04
https://ubuntuhandbook.org/index.php/2021/03/oracle-java-16-released-install-ubuntu-20-04/

sudo apt update
sudo apt install default-jdk
sudo apt update
sudo apt install default-jre
sudo apt install software-properties-common
sudo add-apt-repository ppa:linuxuprising/java
sudo apt update
apt install oracle-java17-installer
sudo apt install oracle-java17-set-default

2.
Install latest FFMPEG or use your old ( Advice use lates for quick start)
wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz
tar -xf ffmpeg-release-amd64-static.tar.xz
then copy file ffmpeg from root to usr/bin

3. Create ramdisk 
mkdir /tmp/ramdisk
chmod 777 /tmp/ramdisk
mount -t tmpfs -o size=1024M tmpfs /tmp/ramdisk

4. Create folder for operations
mkdir mpd
cd mpd

4.
Install your Deb package
wget https://repo.ottshow.net/mpd/Mpdplayer-Ui-2.0.zip
unzip Mpdplayer-Ui-2.0.zip
dpkg -i offer_500.deb

After install mpdplayer Ui 2.0 start automatic
service systemctl stop mpdplayer

5.
Rename V2 files
mv /opt/mpdplayer /opt/mpdplayer-old
mv /etc/mpdplayer/mpd.conf /etc/mpdplayer/mpd-old.conf


7.
Copy new files
wget https://repo.ottshow.net/mpd/update%20mpdplayer%20ui_3.0.zip
wget https://repo.ottshow.net/mpd/static.zip

unzip 'update mpdplayer ui_3.0.zip'
unzip static.zip

cp -R /root/mpd/mpdplayer /opt/mpdplayer
cp /root/mpd/mpd.conf /etc/mpdplayer
mv /root/mpd/static/* /opt/mpdplayer/gui/

8. 
Web interface
systemctl start mpdplayer
http://127.0.0.1:8989/ui
admin
123

9.
Useful commands
systemctl start mpdplayer
systemctl stop mpdplayer
systemctl restart mpdplayer