chore: reorganize files and add some boilerplate

server/src/server.ts

@@ -1,11 +1,36 @@
 import express, { Application, Request, Response } from "express";
+import path from "path";
+import dotenv from "dotenv";
 
-const PORT = process.env.PORT || 3000;
+dotenv.config();
+
+const PORT = process.env.PORT || 5000;
 
 const app: Application = express();
 
-app.get("/", (req: Request, res: Response) => {
-  res.send("Hello, world!");
+if (process.env.NODE_ENV === "production") {
+  const __dirname = path.resolve();
+  app.use(express.static(path.join(__dirname, "client", "dist")));
+
+  app.get("*", (_req, res) =>
+    res.sendFile(path.resolve(__dirname, "client", "dist", "index.html"))
+  );
+} else app.get("/", (_req, res) => res.send("Hello, world!"));
+
+app.use((req, res, next) => {
+  const error = new Error(`Not Found - ${req.originalUrl}`);
+  res.status(404);
+  next(error);
+});
+
+app.use((err: Error, _req: Request, res: Response) => {
+  let status = res.statusCode == 200 ? 500 : res.statusCode;
+  let message = err.message;
+
+  res.status(status).json({
+    message,
+    stack: process.env.NODE_ENV !== "production" ? err.stack : null,
+  });
 });
 
 app.listen(PORT, () =>