Add ./link.sh shortcut for ndcode install.sh

diff --git a/link.sh b/link.sh
new file mode 100755 (executable)
index 0000000..41f600e
--- /dev/null
+++ b/link.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+rm -rf node_modules package-lock.json
+npm install
+npm link