Add docs navigation and tighten API request security

docs/gitbook/map-sharing.md

@@ -0,0 +1,38 @@
+# Share and import maps
+
+Your friend made a map and wants you to try it? They can send you a **ZIP file**: one file containing the map and its pictures. You do not have to open or unpack it yourself.
+
+## Send your own map
+
+1. Sign in as the map's original owner.
+2. Save your changes.
+3. Click **Export ZIP** in your map editor or on its public page.
+4. Send the downloaded file to your friend, for example through a service that accepts files of that size.
+
+Only the original owner can export. The file includes the map's views and locations, so share content you are happy for your friend to receive.
+
+## Play a map your friend sent
+
+1. Download their ZIP to your computer.
+2. Sign in to MineGeo.
+3. Open **Play & maps** and click **Import** beside the search box. You can also find Import in **My account**.
+4. Choose the downloaded ZIP. It must be no larger than **256 MB**.
+5. Wait for MineGeo to prepare it, then open it from your account.
+
+You do not need Minecraft installed. Keep the ZIP as your friend sent it; MineGeo handles opening it.
+
+## What can I do with an imported map?
+
+- Play it privately by yourself.
+- Host a private multiplayer party and invite friends.
+- See the original creator's name next to **Owned by**.
+
+You **cannot publish it, submit it for review, re-export it, or announce its party to Discord**. Private imported games do not add public leaderboard scores. Only the original owner can submit the original map for public review.
+
+You do not need a moderator's approval to import or play the file.
+
+> Friend: “I made an easy map.” The first view: identical trees in every direction. 🌳
+
+## The file will not import
+
+Check the size and make sure you chose the ZIP MineGeo generated. Ask the owner to export a fresh copy if needed. If it still fails, tell support the error you see.