chore: safe exit for database connection on SIGINT

src/app.ts

@@ -6,6 +6,7 @@ import express from "express";
 import engine from "ejs-mate";
 
 import "@bot/bot";
+import prisma from "@server/prisma";
 import homeRouter from "@server/routers/home.router";
 import guildRouter from "@server/routers/guild.router";
 import { attachGuilds } from "@server/middleware/attachGuilds";
@@ -27,6 +28,15 @@ app.use("/", attachGuilds, homeRouter);
 const HOST = process.env.HOST || "localhost";
 const PORT = process.env.PORT || 3000;
 
-app.listen(PORT, () => {
+const server = app.listen(PORT, () => {
     console.log(`Server is listening on port http://${HOST}:${PORT}`);
+});
+
+process.on("SIGINT", () => {
+    console.log("\nShutdown signal received...");
+
+    prisma.$disconnect();
+    server.close(error => {
+        process.exit(error ? 1 : 0);
+    });
 });