Check RAM availability before install of matrix

src/freedombone-app-etherpad

         exit 7359
     fi
 
-    # Check the amount of RAM
-    ram_available=$(grep MemTotal /proc/meminfo | awk '{print $2}')
-    if [ $ram_available -lt 2000000 ]; then
-        echo $'Need at least 2GB RAM to install etherpad'
-        exit 783524
-    fi
+    check_ram_availability 2
 
     if [ -f $IMAGE_PASSWORD_FILE ]; then
         ETHERPAD_ADMIN_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"

src/freedombone-app-matrix

 }
 
 function install_matrix {
+    check_ram_availability 1.5
+
     if [ ! -d $INSTALL_DIR ]; then
         mkdir -p $INSTALL_DIR
     fi

src/freedombone-utils-setup

     done
 }
 
+function check_ram_availability {
+    minimum_ram_gb="$1"
+    minimum_ram_bytes=$((minimum_ram_gb * 1024 * 1024))
+
+    ram_available=$(grep MemTotal /proc/meminfo | awk '{print $2}')
+    if [ $ram_available -lt $minimum_ram_bytes ]; then
+        echo $"Need at least ${minimum_ram_gb}GB RAM to install this app"
+        exit 783524
+    fi
+}
+
 # NOTE: deliberately no exit 0