serve: make externally available

package.json

@@ -7,7 +7,7 @@
     "start": "webpack-dev-server --mode development",
     "build": "webpack --mode production",
     "build-fresh": "rm -rf build/ && npm run build",
-    "serve": "ws -d build --compress",
+    "serve": "ws -d build --compress --hostname 0.0.0.0",
     "test": "tests",
     "lint": "eslint src",
     "format": "prettier --write src/**/*.js"