docs(other-api/serve): add preserve cache in development example (rem…

…ix-run#4066)

Co-authored-by: Mehdi Achour <machour@gmail.com>
Co-authored-by: Michaël De Boey <info@michaeldeboey.be>
Co-authored-by: Mehdi Achour <machour@gmail.com>

contributors.yml

@@ -426,3 +426,4 @@
 - zachdtaylor
 - zainfathoni
 - zhe
+- jmorel88

docs/other-api/serve.md

@@ -32,7 +32,32 @@ In development, `remix-serve` will ensure the latest code is run by purging the
     }
 
     const record = await fakeDb.stuff.find(params.foo);
-    cache.set(params.foo, res);
+    cache.set(params.foo, record);
+    return json(record);
+  }
+  ```
+
+  If you need a workaround for preserving cache in development, you can store it in the global variable.
+
+  ```ts lines=[1-9] 
+  // since the cache is stored in global it will only 
+  // be recreated when you restart your dev server.
+  const cache = (() => {
+    if (!global.uniqueCacheName) {
+      global.uniqueCacheName = new Map();
+    }
+
+    return global.uniqueCacheName;
+  })
+
+
+  export async function loader({ params }) {
+    if (cache.has(params.foo)) {
+      return json(cache.get(params.foo));
+    }
+
+    const record = await fakeDb.stuff.find(params.foo);
+    cache.set(params.foo, record);
     return json(record);
   }
   ```