Add link to Discord invite (#1365)

Make it easier for people to connect to the Discord server.

Author: cybit

astro.config.mjs

@@ -121,6 +121,7 @@ export default defineConfig({
     "/programme/rust-summit": "/session/rust-summit",
     "/programme/c-api-summit": "/session/c-api-summit",
     "/programme/wasm-summit": "/session/webassembly-summit",
+    "/discord": "https://discord.gg/BhTN2zJPMh",
   },
   integrations: [
     mdx(),