add yum / apt package manager detection

INSTALL.sh

@@ -25,9 +25,20 @@ until [[ $INSTALL_SYSTEM_DEPENDENCIES =~ (y|n) ]]; do
     read -rp "Install system dependencies? [y/n]: " -e INSTALL_SYSTEM_DEPENDENCIES
 done
 
-## @TODO check for package manager support
+## Dependencies installation requested
 if [[ $INSTALL_SYSTEM_DEPENDENCIES == "y" ]]; then
-    sudo apt install libpq-dev\
+
+    ### Detect package manager
+    if [[ ! -z $(which apt) ]]; then
+        CMD_INSTALL="apt install"
+    elif [[ ! -z $(which yum) ]]; then
+        CMD_INSTALL="yum install"
+    else
+        echo "Package manager not supported!" && exit
+    fi
+
+    ### Install dependencies
+    sudo $CMD_INSTALL   libpq-dev\
                         bison\
                         libreadline-dev\
                         git\