add per-user bot limit

src/server.ts

@@ -50,6 +50,8 @@ app.use(auth);
 app.post('/run', (req: Request<{}, any, RunRequestBody>, res: Response) => {
     const { botId, discordId, envFile, zbrJson, commands, dbBase64 } = req.body;
     const key = `${discordId}-${botId}`;
+    const userHasRunningBot = Array.from(processes.keys()).some(k => k.startsWith(`${discordId}-`));
+    if (userHasRunningBot) return res.status(400).send('You already have a bot running. Stop it before starting another.');
     if (processes.has(key)) return res.status(400).send('Bot already running');
     const tempDir = `/tmp/zbr-${discordId}-${botId}`;
     fs.mkdirSync(tempDir, { recursive: true });