Rewrite in Shell

README.md

@@ -24,7 +24,8 @@ Ensure your system meets the following prerequisites:
 2. Install the required packages by running the following command in your terminal or command prompt:
 
 ```sh
-python3 ./setup.py
+chmod +x ./setup.sh
+./setup.sh
 ```
 
 ## Usage

setup.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+has_pip() {
+    command -v pip >/dev/null 2>&1
+}
+
+check_and_install_dependency() {
+    if ! pip show "$1" >/dev/null 2>&1; then
+        pip install "$1"
+    fi
+}
+
+install_dependencies() {
+    if ! has_pip; then
+        echo "pip is not installed"
+        return
+    fi
+
+    check_and_install_dependency 'requests'
+    check_and_install_dependency 'qrcode'
+    check_and_install_dependency 'Pillow'
+}
+
+install_dependencies