Step-by-Step Installation Instructions for Ubuntu

Added Step-by-Step installation instructions to install Syng on Ubuntu, by popular demand.

docs/Client-Installation-Ubuntu.md

+# Step-by-Step Installation (Ubuntu)
+
+## Install Ubuntu
+
+You can download it from [ubuntu.com](https://ubuntu.com/download/desktop).
+
+## Install Dependencies
+
+Open a terminal in the folder you want to install Syng in: right click in Nautilus (the file manager) and select *Open in Terminal*.
+
+__Python 3__ should already be installed on your system.
+You also need __Git__, [pipx](https://github.com/pypa/pipx) (for installing Poetry), [mpv](https://mpv.io/) (for playing audio and videos) and [yt-dlp](https://github.com/yt-dlp/yt-dlp) (for downloading videos from YouTube) and __python3-tk__ to use the configuration GUI.
+
+Install dependencies:
+```
+sudo add-apt-repository universe
+sudo apt update
+sudo apt install git pipx mpv yt-dlp python3-tk
+```
+
+[Poetry](https://python-poetry.org/) is recommended for managing the installation.
+Install Poetry:
+```
+pipx install poetry
+pipx ensurepath
+```
+
+Then close an reopen the terminal.
+
+## Clone Repository
+
+Clone the repository:
+```
+git clone https://git.k-fortytwo.de/christofsteel/syng2.git
+```
+
+Then enter the newly downloaded directory:
+```
+cd syng2
+```
+
+## Install Syng
+
+Now the Python dependencies need to be installed. Poetry is recommended for this step, to not interfere with other Python projects on the same machine.
+
+Install Syng:
+```
+poetry install -E client
+```
+
+## Configure Syng
+
+Syng comes with a graphical configuration utility.
+
+```
+poetry run syng-gui
+```
+
+## Start Syng
+
+Start Syng:
+```
+poetry run syng-client
+```