docs: Add fileservice guides for S3 and Spaces (#430)

* docs: Add fileservice guides for S3 and Spaces

* fix: remove we in s3 guide

* fix: typos in spaces guide

www/docs/sidebars.js

@@ -79,6 +79,14 @@ module.exports = {
           type: "doc",
           id: "how-to/create-medusa-app",
         },
+        {
+          type: "doc",
+          id: "how-to/uploading-images-to-spaces",
+        },
+        {
+          type: "doc",
+          id: "how-to/uploading-images-to-s3",
+        },
       ],
     },
     {
@@ -99,5 +107,15 @@ module.exports = {
         },
       ],
     },
+    {
+      type: "category",
+      label: "Deploy",
+      items: [
+        {
+          type: "doc",
+          id: "how-to/deploying-on-heroku",
+        },
+      ],
+    },
   ],
 }