Added bash installer for Linux systems

Author: OSINT-TECHNOLOGIES

installer.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+read -p "Do you want to start the installer? [Y/N]: " UserInput
+if [[ "${UserInput^^}" != "Y" ]]; then
+    exit 0
+fi
+
+echo
+
+Menu() {
+    echo "Select an appropriate menu item:"
+    echo "[1] Clone repository and install requirements"
+    echo "[2] Only install requirements"
+    read -p "Enter the number: " UserChoice
+    echo
+
+    if [[ "${UserChoice}" == "1" ]]; then
+        CloneAndInstall
+    elif [[ "${UserChoice}" == "2" ]]; then
+        InstallDependencies
+    else
+        echo "Incorrect choice."
+        echo
+        Menu
+    fi
+}
+
+CloneAndInstall() {
+    echo "Cloning repository and installing requirements..."
+    git clone https://github.com/OSINT-TECHNOLOGIES/dpulse
+    cd dpulse || exit 1
+    pip install -r requirements.txt
+
+    echo
+}
+
+InstallDependencies() {
+    echo "Installing requirements..."
+    pip install -r requirements.txt
+
+    echo
+}
+
+End() {
+    echo "Installation end."
+    echo
+    read -p "Press Enter to continue..."
+}
+
+Menu
+End