Add an electron app for the React front-end.

client/main.js

@@ -0,0 +1,57 @@
+const path = require("path");
+
+const { app, BrowserWindow } = require("electron");
+const isDev = require("electron-is-dev");
+const windowStateKeeper = require("electron-window-state");
+
+function createWindow() {
+  let mainWindowState = windowStateKeeper({
+    defaultWidth: 1000,
+    defaultHeight: 800,
+  });
+
+  // Create the browser window.
+  const win = new BrowserWindow({
+    x: mainWindowState.x,
+    y: mainWindowState.y,
+    width: mainWindowState.width,
+    height: mainWindowState.height,
+    show: false,
+    webPreferences: {
+      nodeIntegration: true,
+    },
+  });
+  mainWindowState.manage(win);
+
+  // and load the index.html of the app.
+  // win.loadFile("index.html");
+  win.loadURL(
+    isDev
+      ? "http://localhost:3000"
+      : `file://${path.join(__dirname, "../build/index.html")}`
+  );
+  // Open the DevTools.
+  if (isDev) {
+    win.webContents.openDevTools({ mode: "detach" });
+  }
+}
+
+// This method will be called when Electron has finished
+// initialization and is ready to create browser windows.
+// Some APIs can only be used after this event occurs.
+app.whenReady().then(createWindow);
+
+// Quit when all windows are closed, except on macOS. There, it's common
+// for applications and their menu bar to stay active until the user quits
+// explicitly with Cmd + Q.
+app.on("window-all-closed", () => {
+  if (process.platform !== "darwin") {
+    app.quit();
+  }
+});
+
+app.on("activate", () => {
+  if (BrowserWindow.getAllWindows().length === 0) {
+    createWindow();
+  }
+});