Create installer script. (#100)

This script might be broken, I'm in school right now, so I can't test it
at the moment. I will soon

## Description

**What issue are you solving (or what feature are you adding) and how
are you doing it?**

 I have made a test installer script for locally hosting nestri.

Co-authored-by: Wanjohi <71614375+wanjohiryan@users.noreply.github.com>

install-beta.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+
+# Display a warning message
+echo "THIS SCRIPT IS IN A PRE-ALPHA STAGE. RUNNING IT MAY DAMAGE YOUR OPERATING SYSTEM INSTALLATION. Co-created with ChatGPT."
+read -p "Do you wish to proceed? (yes/no): " choice
+if [[ "$choice" != "yes" ]]; then
+  echo "Exiting script."
+  exit 0
+fi
+
+# Function to display an error and exit
+error_exit() {
+  echo "$1" >&2
+  exit 1
+}
+
+# Ensure CUDA is installed and up-to-date
+CUDA_VERSION=$(nvcc --version | grep release | awk '{print $6}' | cut -d ',' -f 1)
+REQUIRED_CUDA_VERSION="12.0"
+if [[ -z "$CUDA_VERSION" ]]; then
+  error_exit "CUDA is not installed or not in your PATH. Please install CUDA $REQUIRED_CUDA_VERSION or newer."
+elif [[ $(echo "$CUDA_VERSION $REQUIRED_CUDA_VERSION" | awk '{print ($1 >= $2)}') -ne 1 ]]; then
+  error_exit "CUDA version $CUDA_VERSION is outdated. Please update to version $REQUIRED_CUDA_VERSION or newer."
+fi
+
+# Ensure Docker and nvidia-docker are installed
+DOCKER_VERSION=$(docker --version)
+if [[ $? -ne 0 ]]; then
+  error_exit "Docker is not installed. Please install Docker and ensure it is in your PATH."
+fi
+
+# Ensure GPU drivers are up-to-date
+NVIDIA_DRIVER_VERSION=$(nvidia-smi --query-gpu=driver_version --format=csv,noheader)
+REQUIRED_DRIVER_VERSION="520.56.06"
+if [[ $(echo "$NVIDIA_DRIVER_VERSION $REQUIRED_DRIVER_VERSION" | awk '{print ($1 >= $2)}') -ne 1 ]]; then
+  error_exit "Nvidia driver version $NVIDIA_DRIVER_VERSION is outdated. Please update to version $REQUIRED_DRIVER_VERSION or newer."
+fi
+
+# Ensure Xorg display is not running
+XORG_RUNNING=$(nvidia-smi | grep "No running processes found")
+if [[ -z "$XORG_RUNNING" ]]; then
+  error_exit "Xorg display server is running on your Nvidia GPU. Please stop it and try again."
+fi
+
+# Ensure nvidia-drm is loaded with modeset=1
+NVIDIA_DRM_MODESET=$(cat /sys/module/nvidia_drm/parameters/modeset)
+if [[ "$NVIDIA_DRM_MODESET" -ne 1 ]]; then
+  error_exit "nvidia-drm module is not loaded with modeset=1. Please ensure the module is loaded correctly."
+fi
+
+# Step 1: Navigate to the game directory
+echo "Navigating to the game directory..."
+cd "$HOME/.steam/steam/steamapps" || error_exit "Failed to change directory to $HOME/.steam/steam/steamapps"
+ls -la .
+
+# Step 2: Generate a session ID
+echo "Generating a session ID..."
+SESSION_ID=$(head /dev/urandom | LC_ALL=C tr -dc 'a-zA-Z0-9' | head -c 16)
+echo "Session ID: $SESSION_ID"
+
+# Step 3: Launch the Nestri server
+echo "Launching Nestri server..."
+docker run --gpus all --device=/dev/dri --name nestri -it --entrypoint /bin/bash -e SESSION_ID="$SESSION_ID" -v "$(pwd)":/game -p 8080:8080/udp --cap-add=SYS_NICE --cap-add=SYS_ADMIN ghcr.io/nestriness/nestri/server:nightly || error_exit "Failed to launch the Nestri server."
+
+# Step 4: Configure the game within the container
+echo "Configuring the game within the container..."
+docker exec -it nestri bash -c "ls -la /game && /etc/startup.sh > /dev/null &" || error_exit "Failed to configure the game within the container."
+
+# Step 5: Wait for the X11 directory and run the game
+echo "Waiting for /tmp/.X11-unix directory to appear..."
+while [ ! -d /tmp/.X11-unix ]; do
+  sleep 1
+done
+
+# Running the game
+echo "Running the game..."
+read -p "Enter the name of your game executable (e.g., game.exe): " GAME_EXE
+docker exec -it nestri bash -c "nestri-proton -pr $GAME_EXE" || error_exit "Failed to run the game."
+
+# Step 6: Provide the play URL
+echo "Your game is ready to play!"
+echo "Navigate to the following URL in your browser:"
+echo "https://nestri.io/play/$SESSION_ID"