Added stdin check to hello world script

hello/world.sh

@@ -1,4 +1,15 @@
 #!/usr/bin/env bash
 
 echo "Hello world!"
-echo "Remaining arguments: $@"
+
+if [ $# -gt 0 ]; then
+    echo "Got CLI arguments:"
+    for ((i = 1; i <= $#; ++i)); do
+        echo "$i: ${!i}"
+    done
+fi
+
+if read -t 0 _; then
+    echo "Recieved stdin:"
+    cat
+fi