(#2) Booster roles can now be linked to members.

Next steps:
 * Remove booster roles from the DB and Guild when someone stops
   boosting
 * Add booster roles to the DB and Guild when someone starts boosting

Signed-off-by: Louis Hollingworth <louis@hollingworth.ch>

src/events/guild_join.ts

@@ -0,0 +1,15 @@
+import { ArgsOf, Discord, On } from "discordx";
+import { prisma } from "../main.js";
+
+@Discord()
+export class GuildJoin {
+  @On({ event: "guildCreate" })
+  fn([guild]: ArgsOf<"guildCreate">) {
+    prisma.guild.create({
+      data: {
+        id: guild.id,
+        name: guild.name,
+      },
+    });
+  }
+}