Update getting started to include evie's tutorial

docs/custom/getting_started.js

@@ -25,5 +25,9 @@ To install discord.js from the rewrite branch:
 \`\`\`bash
 npm i --save hydrabolt/discord.js#indev-rewrite
 \`\`\`
+
+## Tutorials
+LuckyEvie, a helper in the discord.js channel, has put together a great tutorial on getting to grips with discord.js.
+It's worth a read and you can find it [here.](LuckyEvie#4611)
 `,
 };