docs: Add example for hashbang with local tsx (#522)

README.md

@@ -251,6 +251,15 @@ $ ./file.ts hello
 argv: [ 'hello' ]
 ```
 
+If you prefer to use a local `tsx` instead of the global one, you can use `npx`:
+
+_file.ts_
+```ts
+#!/usr/bin/env npx tsx
+
+console.log('argv:', process.argv.slice(2))
+```
+
 ### VS Code debugging
 
 #### Setup