chore: move proxy-container to apps (#11435)

* chore: move proxy-container to apps

* chore: limit next/react rules to next apps

* chore: add standalone issue template

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Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

apps/proxy-container/src/index.ts

@@ -0,0 +1,13 @@
+import { createServer } from 'node:http';
+import process from 'node:process';
+import { proxyRequests } from '@discordjs/proxy';
+import { REST } from '@discordjs/rest';
+
+process.on('SIGINT', () => process.exit(0));
+
+// We want to let upstream handle retrying
+const api = new REST({ rejectOnRateLimit: () => true, retries: 0 });
+const server = createServer(proxyRequests(api));
+
+const port = Number.parseInt(process.env.PORT ?? '8080', 10);
+server.listen(port, () => console.log(`Listening on port ${port}`));