Support npm run serve

Signed-off-by: Louis Chemineau <louis@chmn.me>

package.json

@@ -20,6 +20,7 @@
 		"dev": "NODE_ENV=development webpack --config webpack.common.js",
 		"watch": "NODE_ENV=development webpack --progress --watch --config webpack.common.js",
 		"build": "NODE_ENV=production webpack --progress --config webpack.common.js",
+		"serve": "NODE_ENV=development webpack serve --progress --config webpack.common.js",
 		"lint": "eslint --ext .js,.vue src",
 		"lint:fix": "eslint --ext .js,.vue src --fix",
 		"test": "jest",
@@ -95,4 +96,4 @@
 			"<rootDir>/node_modules/jest-serializer-vue"
 		]
 	}
-}
+}