feat: install lnbits.sh bash script (#2684) (#3101)

docs/guide/installation.md

@@ -29,11 +29,13 @@ It is recommended to use the latest version of Poetry. Make sure you have Python
 
 ### Install Python 3.12
 
+## Option 2 (recommended): Poetry
+
+It is recommended to use the latest version of Poetry. Make sure you have Python version 3.9 or higher installed.
+
+### Verify Python version
+
 ```sh
-sudo add-apt-repository -y ppa:deadsnakes/ppa
-sudo apt update -y
-sudo apt install -y python3.12 python3.12-dev # ensure correct headers needed for secp256k1
-sudo apt install -y pkg-config python3-dev build-essential # ensure correct headers
 python3 --version
 ```
 
@@ -83,6 +85,18 @@ poetry install --only main
 # Start LNbits with `poetry run lnbits`
 ```
 
+## Option 2: Install script (on Debian/Ubuntu)
+
+```sh
+wget https://raw.githubusercontent.com/lnbits/lnbits/main/lnbits.sh &&
+chmod +x lnbits.sh &&
+./lnbits.sh
+```
+
+Now visit `0.0.0.0:5000` to make a super-user account.
+
+`./lnbits.sh` can be used to run, but for more control `cd lnbits` and use `poetry run lnbits` (see previous option).
+
 ## Option 3: Nix
 
 ```sh

lnbits.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Check install has not already run
+if [ ! -d lnbits/data ]; then
+
+  # Update package list and install prerequisites non-interactively
+  sudo apt update -y
+  sudo apt install -y software-properties-common
+  
+  # Add the deadsnakes PPA repository non-interactively
+  sudo add-apt-repository -y ppa:deadsnakes/ppa
+  
+  # Install Python 3.9 and distutils non-interactively
+  sudo apt install -y python3.9 python3.9-distutils
+
+  # Install Poetry
+  curl -sSL https://install.python-poetry.org | python3.9 -
+
+  # Add Poetry to PATH for the current session
+  export PATH="/home/$USER/.local/bin:$PATH"
+
+  if [ ! -d lnbits/wallets ]; then
+    # Clone the LNbits repository
+    git clone https://github.com/lnbits/lnbits.git
+    if [ $? -ne 0 ]; then
+      echo "Failed to clone the repository ... FAIL"
+      exit 1
+    fi
+    # Ensure we are in the lnbits directory
+    cd lnbits || { echo "Failed to cd into lnbits ... FAIL"; exit 1; }
+  fi
+
+  git checkout main
+  # Make data folder
+  mkdir data
+
+  # Copy the .env.example to .env
+  cp .env.example .env
+
+elif [ ! -d lnbits/wallets ]; then
+  # cd into lnbits
+  cd lnbits || { echo "Failed to cd into lnbits ... FAIL"; exit 1; }
+fi
+
+# Install the dependencies using Poetry
+poetry env use python3.9
+poetry install --only main
+
+# Set environment variables for LNbits
+export LNBITS_ADMIN_UI=true
+export HOST=0.0.0.0
+
+# Run LNbits
+poetry run lnbits