following along part 3

parts/3/followAlong/index.js

@@ -0,0 +1,42 @@
+const express = require("express");
+const app = express();
+
+let notes = [
+  { id: "1", content: "HTML is easy", important: true },
+  { id: "2", content: "Browser can execute only JavaScript", important: false },
+  {
+    id: "3",
+    content: "GET and POST are the most important methods of HTTP protocol",
+    important: true,
+  },
+];
+
+app.get("/", (request, response) => {
+  response.send("<h1>Hello World!</h1>");
+});
+
+app.get("/api/notes", (request, response) => {
+  response.json(notes);
+});
+
+app.get("/api/notes/:id", (request, response) => {
+  const id = request.params.id;
+  const note = notes.find((note) => note.id === id);
+  if (note) {
+    response.json(note);
+  } else {
+    response.status(404).end();
+  }
+});
+
+app.delete("/api/notes/:id", (request, response) => {
+  const id = request.params.id;
+  notes = notes.filter((note) => note.id !== id);
+
+  response.status(204).end();
+});
+
+const PORT = 3001;
+app.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});