Move prerequisites.sh to lib folder

lib/prerequisites.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+
+## Check if user is a su
+echo "Welcome to the starting a bridgehead. We will get your instance up and running in no time"
+echo "First we will check if all prerequisites are met ..."
+prerequisites="git docker docker-compose"
+for prerequisite in $prerequisites; do
+  $prerequisite --version 2>&1
+  is_available=$?
+  if [ $is_available -gt 0 ]; then
+    log "ERROR" "Prerequisite not fulfilled - $prerequisite is not available!"
+    exit 79
+  fi
+  # TODO: Check for specific version
+done
+
+echo "Checking site.conf"
+
+#check if site.conf is created
+if [ ! -f site.conf ]; then
+  echo "Please create your specific site.conf file from the site.dev.conf"
+  exit
+fi
+
+#Load site specific variables
+source site.conf
+
+if [ -z "$site_name" ]; then
+  echo "Please set site_name"
+fi
+
+echo "Checking site-config module"
+
+## Download submodule
+if [ ! -d "site-config" ]; then
+  echo "Please set up the site-config folder. Instruction are in the readme."
+  exit
+else
+  echo "Site configuration is already loaded"
+fi
+
+#Check if a project is selected
+if [ -z "$project"  ]; then
+  echo "No project selected! Please add a Project in your local site.conf."
+  exit
+fi
+
+#check if project env is present
+if [ -d "site-config/${project}.env" ]; then
+   echo "Please copy the tempalte from ${project} and put it in the site-config folder"
+fi
+
+echo "All prerequisites meet! All systems are ready to go!"