Promote local install over global in README (#590)

Author: rakannimer

README.md

@@ -10,10 +10,17 @@
 ## Installation
 
 ```sh
+# Locally in your project
+npm install -D ts-node
+npm install -D typescript
+
+# Or globally (not recommended)
 npm install -g ts-node
 npm install -g typescript
 ```
 
+**Tip:** Installing modules locally allows you to control and share the versions through `package.json`.
+
 ## Features
 
 * Execute TypeScript files with node