Add instructions for global installation.

Author: mkantor

README.md

@@ -15,10 +15,17 @@ In the meantime, first install [node](https://nodejs.org/en/download/) and
 git clone https://github.com/mkantor/code-from-ts-playground-url.git
 cd code-from-ts-playground-url
 npm install
-npm start https://www.typescriptlang.org/play?#code/MYewdgzgLgBAHgLhtATgSzAcxgXhgIgAkBTAG1JABoYAVATwAdiBlYdBqAQnyA
+npm start "https://www.typescriptlang.org/play?#code/MYewdgzgLgBAHgLhtATgSzAcxgXhgIgAkBTAG1JABoYAVATwAdiBlYdBqAQnyA"
 ```
 
 You should see this output:
 ```ts
 const x: string = "Hello, TypeScript!"
 ```
+
+To install globally:
+```sh
+cd code-from-ts-playground-url
+npm install && npm run build && npm install -g .
+code-from-ts-playground-url "https://www.typescriptlang.org/play?#code/O4SwdgJg9sB0A2UDGBDALiKZYAsBOApgGYAEAvCQEQ5poAOAzgFwD0LAnlAK5pewBGBFhACKwACzAAnAHUA5gA0kIykA"
+```

package.json

@@ -6,7 +6,8 @@
     "code-from-ts-playground-url": "./index.js"
   },
   "scripts": {
-    "start": "tsc --build --clean && tsc --build && ./index.js"
+    "build": "tsc --build --clean && tsc --build",
+    "start": "npm run build && ./index.js"
   },
   "dependencies": {
     "lz-string": "^1.4.4"