[#1] Add git installer script

Author: agentmilindu

installers/git/installer.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+YUM_CMD=$(which yum)
+APT_GET_CMD=$(which apt-get)
+DNF_CMD=$(which dnf)
+
+ if [ ! -z $APT_GET_CMD ]; then
+    sudo apt-get update
+    sudo apt-get install git
+ elif [ ! -z $DNF_CMD ]; then
+    sudo dnf install git
+ elif [ ! -z $YUM_CMD ]; then
+    sudo yum install git
+ else
+    echo "error can't install package"
+    exit 1;
+ fi
+
+git --version