rootへのアクセスで固定パスを返すように

src/index.ts

@@ -1,6 +1,7 @@
 import express from "express";
 import Logger from "@src/logger";
 import debugRouter from "@src/routers/debugRouter";
+import path from "path";
 
 const app = express();
 const port = 3000;
@@ -9,7 +10,7 @@ const logger = new Logger();
 logger.setTag("index.ts");
 
 app.get("/", (req, res) => {
-    res.send("Hello World!");
+    res.status(200).sendFile("index.html", { root: "static" });
 });
 
 app.use(express.json());