add node express & mysql starter template

web/other/node-express-ts-mysql-starter/src/db.ts

@@ -0,0 +1,41 @@
+import mysql from "mysql2/promise";
+
+const user = process.env.MYSQL_USER;
+const password = process.env.MYSQL_PASSWORD;
+const database = process.env.MYSQL_DATABASE;
+const host = process.env.MYSQL_HOST;
+const port = process.env.MYSQL_PORT;
+
+if (!user) {
+  throw new Error("MYSQL_USER is not set");
+}
+
+if (!password) {
+  throw new Error("MYSQL_PASSWORD is not set");
+}
+
+if (!database) {
+  throw new Error("MYSQL_DATABASE is not set");
+}
+
+if (!host) {
+  throw new Error("MYSQL_HOST is not set");
+}
+
+if (!port) {
+  throw new Error("MYSQL_PORT is not set");
+}
+
+if (isNaN(parseInt(port))) {
+  throw new Error("MYSQL_PORT is not a number");
+}
+
+export async function connect() {
+  return await mysql.createConnection({
+    host,
+    user,
+    password,
+    database,
+    port: parseInt(port || "3306"),
+  });
+}

web/other/node-express-ts-mysql-starter/src/index.ts

@@ -0,0 +1,15 @@
+import express from "express";
+import { config } from "dotenv";
+
+config();
+
+const app = express();
+const port = process.env.PORT || 3000;
+
+app.get("/", (req: express.Request, res: express.Response) => {
+  res.send("Express + TypeScript Server");
+});
+
+app.listen(port, () => {
+  console.log(`[server]: Server is running at http://localhost:${port}`);
+});