fix(website): fix local storage usage

Author: christianalfoni

packages/overmind-website/guides/beginner/02_definingstate.md

@@ -56,6 +56,10 @@ Not all state should be explicitly defined. Some state are values based off of o
 h(Example, { name: "guide/definingstate/derived" })
 ```
 
+```marksy
+h(TypescriptNotice, null, "Is is important that you define your state with a **type**, do **NOT** use an **interface**")
+```
+
 The first argument of the function is the state the derived function is attached to. A second argument is also passed and that is the root state of the application, allowing you to access whatever you would need. Two important traits of the derived function is:
 
 1. The state accessed is tracked

packages/overmind-website/src/overmind/effects.ts

@@ -22,8 +22,8 @@ export const router = (() => {
   const validTypescriptQuery = ['true', 'false']
   let currentPath
   let currentQuery: Query = {
-    view: storage.get('theme'),
-    typescript: storage.get('typescript'),
+    view: String(storage.get('theme')),
+    typescript: String(storage.get('typescript')),
   }
   let currentHash = location.hash