Link to 360-gallery in the repo instead of aframe-gallery glitch

Author: vincentfretin

docs/introduction/best-practices.md

@@ -130,7 +130,7 @@ document.querySelector('a-scene').renderer.setTexture2D(ourTexture, 0);
 
 We will try to come with a convenient API in A-Frame to do this automatically.
 
-[360]: https://aframe-360-gallery.glitch.me
+[360]: https://aframe.io/aframe/examples/docs/360-gallery/
 
 For example, this is apparent in the [360° image gallery][360]. If we look at
 the browser performance tools, there will be frame drops when switching to a

docs/introduction/installation.md

@@ -36,7 +36,7 @@ own custom URL name.
 Below are a few other A-Frame Glitches for starters:
 
 - [aincraft](https://github.com/aframevr/aframe/tree/master/examples/docs/aincraft) - Minecraft demo.
-- [aframe-gallery](https://glitch.com/~aframe-gallery) - 360° image gallery.
+- [360-gallery](https://github.com/aframevr/aframe/tree/master/examples/docs/360-gallery/) - 360° image gallery.
 - [community-components](https://github.com/aframevr/aframe/tree/master/examples/docs/community-components) - Showcase of various community components.
 - [aframe-vaporwave](https://glitch.com/~aframe-vaporwave) - Retro-futuristic scene.