Added testing framework and updated dependencies.

README.md

@@ -2,15 +2,19 @@
 
 A browser game inspired by Breach Protocol from Cyberpunk 2077.
 
-## Run in development mode
+## Building the project
 
 ```
+// run once to install all dependencies
+npm i
+
+// run all tests
+npm run test
+
+// run the server for local development
 npm run serve
-```
 
-### Build for production
-
-```
+// build for production
 npm run build
 ```