add tutorial redirect

+ place learn link last in repl header
+ fix all old links to /tutorial

website/src/pages/learn/getting-started.mdx

@@ -108,7 +108,7 @@ Similarly, we can also use `s` to change the sound of our pitches:
 
 Try changing the sound to `square`, `triangle` or `sine`!
 
-We will go into the defails of sounds and synths [later](http://localhost:3000/tutorial/#web-audio-output).
+We will go into the defails of sounds and synths [later](/learn/synths-samples-effects).
 
 <br />
 

website/src/pages/learn/index.astro

@@ -0,0 +1,3 @@
+<script is:inline>
+  window.location.pathname = `/learn/getting-started`;
+</script>