Add docs navigation and tighten API request security

docs/gitbook/SUMMARY.md

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+# Summary
+
+* [Welcome to MineGeo](README.md)
+* [Your first game](playing.md)
+* [Multiplayer and chat](multiplayer.md)
+* [Accounts and appearance](accounts.md)
+* [Windows desktop client](desktop.md)
+* [Create and publish a map](creating-maps.md)
+* [Capture your Minecraft world](server-plugin.md)
+* [Contribute panoramas](contributions.md)
+* [Share and import maps](map-sharing.md)
+* [Bug reports and support](support.md)
+* [Content reports and appeals](content-reports.md)
+* [Troubleshooting](troubleshooting.md)
+* [Community and badges](staff.md)